Congrats, and welcome aboard. I would suggest taking a riding course as a refresher, (at least watch some videos) , buy a service manual, and add the appropriate tools as needed to your collection. (Things such as torque wrenches etc). I do my own general maintenance on my bike. If I need anything major, I am fortunate to have a motorcycle guru with oil running through his veins next door.
As a side note, 20 years ago when I was big time racing mountain bikes, I read a lot of magazines, talked to a lot of folks, and had read / heard that if you are about to go down on a gravel road, you could save yourself by 'stomping' your outside pedal. Well, one Sunday, I was racing along a gravel road and someone had cut me off short and clipped my wheel...I'm on my way down, and somehow remembered that bit of advice. ( I never wanted to practice that move and all due to the consequences of crashing on gravel...) I 'stomped' my upside/outside pedal and woolah, the bike popped right back up! Saved me 50-75 yards of gravelly road rash!
So yeah, I believe that reading and videos can help you be prepared for certain situations!
