Starting again, need motivation and new motivational friends

Hey everybody. I'm Ezgi, from Istanbul, Turkey. I'm 28 years old, 5'4'' and 82 kg (180 lbs). I work as an academician and most of the days I sit. I always back aches, neck aches, leg aches... My body always aches, I'm sick of it. My doctor suggest to swim, I'm thinking to start these days.

I had lost 15 kgs (33 lbs) at 2016-2017 and last month I had so much stress and ate junk foods everyday so gain 2 kgs (4.5 lbs) in a month... Now I want to lose 12 kgs (26.5) until July. And after that maybe 10-15 kgs too...

So, I kept away from healthy lifestyle for months and need to go back. I need new friends to keep each other maybe involve some motivational groups in here. I wrote my weight to a paper and hang it on fridge and add every week. I'm open to any suggestions. Please feel free to add.