This will give you a baseline from which to work. Don't do too much too soon. Moderation allows you to come back and train again and again. Over-exuberance leads to frustration, injury, and ultimately quitting. The key is to string together successful days of training.
Some soreness is natural, but avoid pain.
Design a program and schedule that you'll not only stick to, but also incorporate into your lifestyle. Experts say it takes six to eight weeks for behavior modification to change old habits into a routine that complies with new fitness behavior. Most people have started a fitness activity 10 times before they finally comply. Machines won't do your workout for you. Avoid assembling a garage full of unused fitness equipment.