Hello there, Puertorrican newbie here

Hello im 35, 146lbs, 5'2 tall and very very very tired all the time!!! I have RA and arthritis and a bad knee. To young to have so many aches if u ask me. I have 2 beautiful kids a very active 6 year old boy with autism and a 1 year old girly girl that just started walking (yikes). Life is very hectic in my household (but fun :)) but i cant keep up!! I enrolled my self on a training facility just because i dont know how to excercise by myself. Also started eating healthy and green (joining my kids diet, they eat better than me). I joined MFP a year ago after baby number 2 but life events made me forgot all about it (and excuses :( ). Im back and sticking to it this time because IT NEEDS TO GET SERIOUS!!!. Browing through the site i feel very inspired and proud of so many of you already!! Hope to make great friends and inspire others my self.