I generally recommend to play in the lowest possible section if you have not played OTB yet. If you feel like you are a strong player, then you could probably go a division or two up based on your instincts.
I would highly recommend analyzing your game with your opponent afterwards if you both are up for it; that is the most important way to analyze a game. No engine, no opening explorer, nothing - just having a friendly discussion about both of your ideas and thoughts while going through the game is probably the best tool you could have and can be a good way to make friends.
We all know 2020 isn't the best year to talk about OTB chess. However, while online chess has been its own thing for years and will certainly continue to grow, I suspect many online only players may still want to play officially OTB at some point in their lives.
So, my open ended questions ripe for discussion (and geared towards experienced OTB players) are:
- if you are an adult, what kind of section would you recommend playing in in an official tournament?
- should you prepare for dubious openings and idiotic traps?
- do you recommend training with clocks and sets similar to those that will be in the tournament?
-how advisable is it to analyze with your opponent after the game if you can?