Try and maximise protein consumption.
Things like protein yoghurt for example Skyr yoghurt is really great. Things like frozen berries are super tasty and go well with the yoghurt and keep for ages too.
Baked beans! They’re a great source of protein.
Eggs are good too- 2 fried eggs will give you 13g worth of protein.
Protein powder is also good. The vegan ones are super healthy and again mean you get a lot of protein.
Try and avoid things that are just ‘ empty ‘ calories, like sweets or crisps for example.
You can switch things out too if you’re always snacking on crisps how about snacking on a hard boiled egg as it will have similar amounts of saturated fat but provides much needed protein too.
Also think about what you’re having for breakfast in terms of cereal. I personally have protein weetabix as again it’s a solid protein source! Other good options are things like shreddies, bran flakes, cornflakes or porridge too. Try and stick to healthier cereals as they’re more likely fill you up as having things like coco pops can just give u a bit of a sugar rush.
Hope that helps
Also if you download the Fitbit app you can log all your food and drink and track your macros!
Good luck and always remember if you do binge out on some not so healthy stuff you always have the next day to get back on track, and even though gyms are shut you can still go for a run which can easily burn off a few hundred calories in less than an hour.