I am new to the forum as well and have been experiencing the same frustrations. I was also on steriods but recently switched over to Imuran. I feel drained most of the time but I am trying to push myself to lose some excess wieght as well. I would consider myself a semi-health nut exercising on a daily basis but I struggle with dietary restriction. I just wanted to let you know you are not alone!
Since I cannot determine your gender you may want to check out Women's Health or Men's Health Magazines on-line or you can buy them in most supermarkets. I love these for workout tips ranging from cardio to yoga. If nothing else, it keeps me motivated.
Remember that healthy weight loss will allow you to lose no more than 2 pounds a week (you want to retain muscle mass because it burns the most calories). However, losing just 2 pounds takes a lot of work. Best of wishes to you.