Hi there and welcome.
Firstly, consider that you may wish to tell us which airlines, if any, you like, and which ones you have a frequent flier program (FFP)membership with.
If you have any elite status on them, points, vouchers, etc, that may help. I imagine that you are hoping to try to find a way to maximize miles you may already have or learn ways to earn the ones needed for free trips or upgrades?
You will find this to be one of the good sources for doing just that.
Surely others will chime in to help you in ways I am not quallified to (because everyone knows a bit of something but no one knows everything) so good luck sifting thru the many posts.
To start, do you have a trip in mind or places you would go?
Thanks, and welcome.
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If speed is not your thing, distance may as well be. Enjoy and embrace it all!