for light DIY like you say, get an 18v cordless combi drill (not a drill/screwdriver) with TWO batteries.
this is lighter than one big batt, and you can charge one while you are using the other.
Screwfix Titan is a budget brand, but they usually have a 2-year guarantee, so you will get (at leasr) 2 years use out of them
Wickes, Aldi and Lidl own-brands are much the same, and fine for DIY. They often have the same design of battery that can be swapped with other tools in the range. most of these budget tools are similar and made in probably the same a factory in China.
A plastic kit-case is very handy.
Don't worry about getting a set of bits with it. You can easily buy sets at the retailers I mention for modest price.
You will probably end up using only about three of the drill bits, so splashing out on a set of 80 is mostly money down the drain.
you can use a combi drill as a screwdriver, but a drill/driver is not much good as a drill.