i am totally new to these self hosting stuff. am planning of getting a raspberry pi and hosting 24x7 on it.

i want a website on it with very basic html linking to my socials. and another site where people can upload up to 1 mb file once a day. which will be stored in my pi temporarily.

and the other purpose is: i use multiple devices so there are some files that i always need. instead of copying those on all devices. i want to store it in my pi. and perhaps access it remotely (should ask for password)

so... is it possible to make a headless pi running 24x7? and also is 512 mb of ram enough for my use case?