You have two options - do bodyweight fitness (https://reddit.com/r/bodyweightfitness https://reddit.com/r/bodyweightfitness), this does not require equipment e

You have two options - do bodyweight fitness (https://reddit.com/r/bodyweightfitness https://reddit.com/r/bodyweightfitness), this does not require equipment except a pullup bar and maybe some gymnastic rings - do a linear progression barbell training program, like starting strength https://startingstrength.com/get-started/programs https://startingstrength.com/get-started/programs this is definitely easier in the gym because you need a rack, barbell, bench and weights. But if you want to buy it yourself, just make sure you get the "real" barbells, which weigh 20 kg and have rotating "sleeves" at the end which have 50 mm diameter. This is the standard size, the thinner ones are crap.