Hi there, welcome and congratulations on starting your journey!
Obviously lots of great advice here, but wanted to chime in to tell you that it won't be torture forever! I got Zumba DVDs for Christmas in 2010 and started doing them at home a week or so later - I could only do the "short" workouts when I started, maybe 10-15 minutes? But I kept at it and by the end of February of 2011, I joined the YMCA and was doing every Zumba class I could find and
loved it. It made me feel strong, capable and confident and I made some wonderful new friends who had the same struggles as me.
In fact, it opened up a world of other classes and activities and I started taking any and every class I could find - kickboxing, yoga, pilates, spin, cardio strength, athletic conditioning...and lots of others. Some I
hated, but some I really liked and now, I have lots of activities to choose from.
Honestly, it is sometimes still torture, but as others have said, workouts almost always make me feel great afterwards (even when I have to force myself to do it). And, I find that I'm just a lot more active in general - I really do park far away from the doors when I go shopping, I really do take the stairs instead of the elevator - all those "little things" really do add up in the end.
Good luck!