I’ve been playing D&D for a long time, and have DM’d for many people with bad option paralysis. My best advice- accept you will make mistakes and just dive in.
There is a lot to know in D&D, and you aren’t going to get it right the first try. That’s fine. This game is very forgiving with respecing, so if you find you are not using a spell or ability you can always change it out later without issue.
Dive in!
