Over 75 lbs to lose and looking for encouragement and tips

Hi I'm Pam and I am 50 years old....I have been at this weight loss journey for a long time. My weight keeps going up and down. I take alot of medications for rheumatoid arthritis and high cholesterol. I am looking for some friends for encouragement and tips to finally reach my weight loss goal and stay there for good. I have been to weight watchers and have success, but put all my weight back on. I went back and lost 30 lbs again and just stayed there for 8+ mo got discouraged and quit. Now I have almost put all of that 30 lbs back on. I have heard many good things about MFP and I want to get serious about losing weight and being healthy.