Josh gave good advice there.
You may find you can't get the reps on the bodyweight exercises like pullups or dips. That's because unlike with a bar, you can't lower the weight you're using.
That's okay - just aim to do a certain total of reps in each workout, not worrying about how many you get in one go. For example if you do 10 total it might be 3 reps, then 2, 1, and so on. Next workout, 15 total. Then 20. And so on up to 50. Again, don't worry if it's 8 or 2 or whatever, just get the total. If you can do a total of 50 reps of pullups, chinups, dips, pushups or whatever, then you'll be able to do 8-10 in one go, and can do your planned sets like "chinups, 3x8" etc.
The only thing I'd change with Josh's advice is to do it 2-3 times a week, with at least a full clear day between workouts. For example Mon/Thur, Mon/Wed/Fri, Tues/Thu/Sun, etc. In the beginning using just the bar you can do it every day, but once you get into decent weights you'll usually need that rest.
On 2-3 of the off days do something for fitness - go for an hour's walk, swim or cycle, a half-hour's jog, 15 minutes' windsprints, or whatever.
Eat lots.