As others have said, get some basic tools, a screwdriver set, including phillips and flat head. A 16 oz curved claw hammer. Pliers. An adjustable wrench set. A utility knife, you can also get cut resistant work gloves. A tape measure. A torch. A toolbox to put them all in. You might also need a variety of tapes, like masking tape, duct tape etc. Assorted nails and screws, many places sell boxes of various assortments. You might need wall plugs, and an electric drill. You will need a pair of safety glasses, a few dust masks, and possibly ear protectors.
Watch youtube videos, on how how to use the tools. Safety is first. Full concentration, like when you are driving a car, injuries only take a momentary lapse in concentration.
If you are taking something apart, take photos at each stage, and have a clear surface to place parts.
Familiarise yourself with where your water stop valve is.
If in doubt, ask.
Be careful when drilling walls, do not drill in any straight line above below or to the sides of any electrical socket.
www.theguardian.com/lifeandstyle/house-and-homes-blog/2011/nov/16/toolbox-tips-drilling-fixing
Think beforehand what you might need to do the job. Preparation is important, take your time to think, before you start rather than while doing it, if possible.
You will be surprised how much you can achieve, you can quickly pick up the skills as you go along, but don't rush anything.
Get a DIY book.
I recommend you watch some of seejanedrill
m.youtube.com/user/seejanedrill