Strength / Weight Training

I always recommend StrongLifts. Others will differ.

Bodyweight exercises are a great place to start: pressups, squats, planks, split squats etc. If you can find space for a kettlebell that's one way of adding resistance and introducing more exercises.

I think it depends what you're after and what your level / experience is. If you're a novice / looking for motivation, get a PT for a bit ot build confidence and progression whetehr or not you're going bodyweight (outdoors) or gym. If you're a previous gym goer and are looking to get back into it (and are fairly confident of your form), I'd strongly recommend GZCL program - it's a bit like Stronglifts, so concentrates on big compound lifts, but with slightly diff rep ranges and you can add stuff on. There's a free app that logs and calculates everything (Boostcamp) so it's super easy to follow. I've never followed a strict program before and it deffo helped me.

I'd recommend joining a gym and doing stronglifts 5x5, I struggle to do anything unless its prescribed and easy to interact with. You just use the app to track your workouts and it tells you what weight to use.

It starts off slow, you'll feel stupid for just squatting the bar but a month in you will say to your self "this is fucking hard" when you are trying to do your over head lift with 15kgs on the bar.

I did it for ~12 weeks straight, it fixed my lower back pain which I had spent 100s on physios for. I also lost 10kg and looked really good. 5/5 recommend. I stopped doing it because my gym across the road was rammed 24/7.

I did this last year, I contacted a local PT (for £30) who did me an upper body programme based on what equipment I had at home.. I can send it through as most can be done with dumbells..