What lesson should I learn first?

Answer 1

From the FAQ:
That depends on what you're trying to achieve. For web development: Start with HTML, and then move on to CSS, JavaScript, JQuery, PHP, and SQL.

For general application programming: Python, C++, and Ruby; then Java, C#, or Swift, based on the platform you're targeting.

Re: https://www.sololearn.com/faq/#q1

Answer 2

www.sololearn.com/faq

Answer 3

HTML is the base for any website. So HTML, then CSS for styling the HTML, then JavaScript or PHP.

Answer 4

☞HTML firstly ♡
it's basic of websites,most importantly.

Answer 5

That depends on what you're trying to achieve. For web development: Start with HTML, and then move on to CSS, JavaScript, JQuery, PHP, and SQL.

For general application programming: Python, C++, and Ruby; then Java, C#, or Swift, based on the platform you're targeting.

Also i am new and i have also started with HTML because it is a very much simple tag language. I love HTML with Sololearn.