What is the difference between front-end and back-end?

Front-end the part with which the user interacts.

usually people who write this are called layout designers what languages are used (Html, css, js)

Beck-end The northern part is the structure of the site due to which it works, this includes the DBMS, logic, etc. which languages will be used(python, php, java)

People who can do both are called: full stack developr

assuming you are in the home page.

1) go to the upper right hand corner

2) click on your "profile picture"

3) go down to "edit profile"

4) it should be titled as "edit your profile", click on "profile picture"

5) choose a file

6) press "change"

you're profile picture is updated

~

storage maybe?

are there options?