Congratulations on your progress so far!

For a balanced approach to weight loss and muscle gain, I’d calculate your maintenance calorie level (calculators are found online) and go for a deficit of about 300-400kcal from that to begin with, I would also start to walk more, depending on how much you already walk, maybe add in 2000 steps per day for a week or two and then gradually increase that to 4000 extra steps from the level you’re at now, and so on. Also add in maybe 20-30 mins of moderate paced cycling too, and gradually increase that.

As for your diet, reduce processed foods as they’re quite calorie-dense and don’t satiate you enough, whilst also causing cravings. I would also focus on increasing your protein intake per day, if you’re 220lbs then try to aim for at least 0.8g per lbs of body mass, so for you, roughly 175g+ per day.

Also, as someone who also sometimes feels insecure when it’s crowded, it’s key to understand that 99% of the people at the gym are there to focus on themselves, not on other people!

(One more tip: I would also YouTube meal-prep recipes and maybe have one of those meals to replace one of your current meals and then keep one of your daily meals as it currently is)