Any clothing ideas for a mtf to ease into non-masc stuff?

Not the person you replied to, but I was going to say "tunics," but their comment covers that more broadly. Something that covers you up, but is easily to style with a jacket, scarf, vest or other accessories. Jeggings are very comfortable if you want something tighter.

I'm a cis-het guy who wears nail polish every day. I live in a very conservative southern state and the only comments I get are women telling me they love the color and asking what the brand is (It's always either Holo Taco or Mooncat). These days, no one cares. And men with nail polish is in the zeitgeist right now, so no one would make any assumptions as to the why you're wearing it.

And I've been wearing nail polish for 20 years. There were times when it was an issue, but I remember this one time back in the early 2000s. I was in high school, walking through the mall and this big guy stops me. He's tatted up, long mangly beard and torn biker leathers on, probably in his 50s. He holds up his own hand to show off his polish and tells me he loves seeing other guys with it. We talk for a bit. He then calls his wife and daughter over and tries to convince me to take his daughter's number.

I think about that guy sometimes when I'm unsure about how people will react to how I look. Given, I am speaking from a place or severe privilege compared to you, but I want to give you a bit of perspective. My sense of style has never really fit in with those around me. I paint my nails, dye my hair. I've worn my share of skirts when it matched my outfit(Once I went to a drag prom with my girlfriend, then we went out for dinner afterwards. Didn't have time to change so I was straight up wearing a plaid dress and heels. The waitress hit on me and 3 different women came up to our table to talk to me and one gave me their number). Sometimes the clothing I wear can be a bit "loud." And over the years I've come to just say "fuck it." This is me. I look this way because I think it looks good or because I like the act of doing it. People can accept that or not, but that's a them problem. As far as I know, no one has ever assumed I was anything other than a straight cis guy, and I've never had any problems.

I'm not saying this to suggest you should dress in a way you're not comfortable with yet or that you shouldn't be on your guard sometimes. But if you're worried about people giving a shit about nail polish while you're taking your first steps, you likely don't need to. I wear traditionally feminine stuff all the time if I think it looks good and don't run into issues. Nail polish, bracelets, rings, some shirts that are definitely cut for women and are a little tight on me.

In fact, women's shirts are a good one for you I think. They're not all low-cut, but with the narrower shoulders and typically shorter sleeves, they do feel different on you while not looking any different to people looking. If you're still feeling self conscious with it on you can put a loose open front shirt on over it to cover any of those features but you still get to wear it.

And if you need any tips on nail polish or nail care, I got you. Nails and nail-beds on hands that have been masculine for years just aren't the same as hands that have been taken care of for polish from early childhood.

Yeah, I feel that. I mostly wear skirts when I'm with a group of queer people.

Rings are an idea, there's pins, necklaces, hair clips/bands. For earrings you should seek a piercer, they're better than these nail canons you get in stores.

You can also use different bags/ wear your bags differently and other smaller changes you can do to how you put together your outfit. Though I myself lack knowledge there.

I think sometimes the absolute hardest part is allowing yourself to do it.

People really don't care what you buy. If anything they do think it's for someone else.

I bought some recently because it was close to a shade I thought and on sale. The hardest part really was like convincing myself it's OK. Nobody said anything. It was all internal.

I don't know where you live, but I just got myself gifted my first or went to the convenient store for it. I don't know who you'd have to ask

Omg they have! I love buying men's shorts with a 7 or 9 inch inseam. My mom and I used to laugh at how many men were wearing tight vacation chinos from lands end in extremely vibrant colors with a pair of boat shoes and no socks. Its so absurdly feminine, and it was peak male fashion only like 5 years ago. Still see them frequently. But when I started to realize I wanted to be visibly queer (before realizing I was transfem) I bought a pair!