-I'd say start with a couple small scale projects. It doesn't have to be long to be good.
-Learn from your mistakes. The more you finished a project the more experience you get (hence why it's important to start with smaller project).
See this as when you start drawing, is it better to start right off the bat with one unique hyperrealistic portrait that will take weeks to make it decent (with no knowledge of anything) or with 100 quick and rough drawing of heads that you can learn from each head you draw ? You'll improve a lot by drawing 100 heads instead of 1.
-Remember that it is okay to fail, don't pressure yourself for no reason, life already does that xD
-Don't start a projet if you feel like you are not ready, skill (art and storytelling) and mentaly-wise.
-Do not treasure what you create. If you prize your creation too much, you won't be able to reflect on what is wrong, how you can improve etc. Don't expect your project to be your magnum opus.
-And probably the most important tips, I received is : "Not all advices are good advices". What works with one person may not work with you.
Know who you can put your trust on but also know when to stand your ground and revaluate the "Rule".