have you ever done weight training to increase muscle/strength?
No, but I've been thinking about it - I just lost a lot of weight and my muscles are pretty weak!
weight training is a very good way to improve muscle and health
That's probably what I need to do! Where should I start?
just find a weight training program that works for you and take it slow to build up muscle
Sounds easy enough!  Does this mean I need to actually lift weights like barbells?
Weight training programs require using free weights and machines for muscle growth