I need to buy laptop

Hi guys I want to buy a laptop for programming, but I couldn't figure out what i really want .

my budget range from 600$ to 1200 .

I found these laptops in the market

(i3 - 4g ram - 256 giga ssd) for 600$

(i5 - 8g ram - 512 giga ssd) for 800$

(i7 - 16g ram - 512 giga ssd) for 1200$

and also ryzen 3 5 and 7 .

here what I want you to Know :

1- I want to use this laptop for programming only (and browser of course),

2 - I will programming for android (for now ),that's mean i need to install android studio , IntelliJ IDEA or Eclipse (maybe other).

so I'm afraid if I buy 1200$ laptop i will regret it , because don't need that much ram or cores or ssd capacity.

and if i buy 600$ i will regret it too ,because it will be too slow or not ideal for programming,less ram -less capacity -less core

I was depressing for long time and I'm slowly back on track so i don't know what going on ( on tech world).

and also there are laptop 2 in 1 (laptop and tablet) with pen, is it worth to buy ?.

dose the laptop now upgrade-able in terms of ram , saying this because of what going on in part replacement issue (like apple ).

so help please what should I buy.

pardon my English not my first Language, and thanks in advance.

Edit : thank you guys very much , that's really help and very informative. 👍 😍