Multitools do a multitude of things ‘ok’ - typically they will not be as good as a specialised tool, but in a pinch, if they are all you have to hand they will do just fine. If you are working at home, or in a workshop, I would suggest investing in the tools you need to do the jobs in hand and add to that tool kit as you need to.
Ultimately, you know more about your situation than anyone else on here. Multitools can be a boon if you do not have access to any other tools, but they invariably are not as good as specialised tools - they are very much the jack-of-all-trades, master-of-none in the tool world… I would still, if you are on a very strict budget, suggest you get some decent pliers, a decent set of screwdrivers, a hammer etc, rather than sink ~£100 into a good and usable multitool (if you buy a cheap, Chinese one, it may not last/hold up if you use it robustly).