Only have 70 hours of experience on my tractor so I'm not a seasoned veteran like a lot of guys on here. The most important thing I've learned safety wise is when using the front end loader never use it without ballast of some kind on the rear of the tractor. MOST IMPORTANT. I have a home made box scraper thats really heavy , made out of 3/4" thick steel. Its the heaviest implement i have so i hook that up to the 3 point hitch. Also I got my rear tires loaded, added approx 900 pounds to the rear of the tractor. The first time i used my loader I had right rear tire 15" off the ground and panicked. lowered bucket and got it back down on the ground eventually. I didn't know what i was doing, could have killed myself or someone else. No BALAST on the back. GO SLOW when using the loader as far as raising and lowering with a load until you get more use to the controls. KEEP the LOAD LOW whenever possible. Move Slowly , Speed will come with experience and learning your controls. I always pay attention and respect the equipment. These are great machines and can do a lot of work but never get lackadaisical when operating.
Trust me , shit can happen fast if you're not paying attention.
Also don't run on road/pavement in 4 wheel drive if you have it, switch out to 2 wheel. I mounted hooks on my bucket, comes in handy when using chains to pick something up.
A set of forks are also very handy , I have the quick change connection and can pop the bucket off and put the forks on in 5 minutes or so. Like having a fork lift.
Pick up pallets or put stuff on 4x4's to store /pickup.
Like you did, if you don't know ask , these guys on here are a wealth of knowledge on here. You can learn a lot.
Good luck, be safe.