Honestly after all the questions I’ve seen today relating to specific apps, that are themselves changing at a blistering pace, my top tip would be:

Maybe stick to the website version for your first day until you grasp how the whole thing works. People responding to your questions might not be able to help you if you’re using an app that does things a nonstandard way. And the mobile website actually works perfectly fine so you’re not missing out on anything.

Once you get the general gist, then add the extra complication of finding your way around an app.