Welcome to the forum.
You really don't have to be that handy to work on Weber grills. Start with baby steps and build from there.
I also bike - did over 5,000 miles last year just commuting 16 miles each way to work every day. My kids (10, 7, 5) also bike. My five year old will do 5 miles each way to a playground in light traffic with us. They also ride the pump track by us.
I do all the maintenance on the bikes except keeping the wheels true. Commuting to work, I simply wore out tons of tires and grips and a seat and cables and derailleurs and a chain or two. We all ride curb find style bikes. The one Trek 20" kid bike is a darn good bike and now has three coats of different colored spray paint on it. Just grabbed an identical Trek bike in pink/purple and ended up fixing it up and giving it away.