I used to like lifting alone, hired a personal trainer and can't say enough about how great that is. I don't even think or worry about what I'm doing or how I'm feeling. He can read me and gets the most out of me EVERY workout. He keeps track of what we do. I just show up and give everything. Pushes me past what I think I can do. Always have a spotter and get thru my workouts faster than I could on my own.
Costs a but of money, but if you can do it, do it. I was only going to train for a little while to help get over a stagnant period, I don't see myself every stopping. Btw, my trainer knows his shit.