I get anxiety from the gym too!! but I have confident friends who I go with and they boost my self-esteem. Maybe that'll help for you too? I feel really awkward and nervous when I'm by myself because I don't know how to do anything LOL. When I go with my confident friends (they don't have to be super athletic! They just have to know how to exercise safely) I feel less anxiety and I end up pushing myself even harder to keep up with them so they don't know I'm a secret weakling.
If this doesn't work for you, I really enjoy jogging outside and yoga indoors. Yoga stretches your body at the same time and I really helps with any back pains associated with sitting in front of a computer all day. You can add weight training with a dumbbell or medicine ball during/afterwards.
About motivation: I also get demotivated relatively quickly, but like @
(you need an account to see links) said, having a friend to bug you about working out is a great motivator!! Start with whatever is comfortable with you. Just do it. If you want to quit after 10 minutes, quit. But you need to start building the habit of regularly exercising; eventually 10 minutes will grow into 15...etc. (when I first started I could only run for 10 minutes before I quit)
About Diet: I gained a lot of weight from college
and realized that it was from eating late at night and/or eating fast food. Of course, you don't have to apply any of these to your life, but I'm going to say at least 20 lbs from my weight loss came from just changing my diet.
Things I did: 1) No eating past 8:00pm. If this means you have to go to bed hungry, that's what you have to do (but you can eat if you really have to. It was just my personal punishment for breaking it frivolously, not tryna starve myself)
2) Completely cut out soda from my diet. Stopped drinking beer, switched to harder alcohols (if you drink), cut out fast food consumption by 50%. Meal prepping really helps here.
3) Tried to incorporate vegetables into everything I ate. For example: I always make a green smoothie with kale, spinach, fruits, etc. every morning with my breakfast so I could get vegetables starting from when I woke up.
4) Drank wayyy more water. I'm below average in this, I drank like 5 cups of water a day when I think you're supposed to drink 8. I'm always dehydrated haha.
Seriously though, these things (without working out too hard, I think like 2x-3x a week) helped me lose a ton of weight, improve my complextion, blah blah. But the key idea here with weight loss is
persistence. If you set a rule, you have to follow it. If you want more info, feel free to pm me!! Good luck!!!!!!!!
*****These are just my opinions from my personal experiences. I recently was overweight and lost 25lbs from doing these things, which may or may not be correct.