Welcome to Fluther.
You don’t necessarily need to hire “a company” to do housekeeping; that’s a generally low-cost and low tech occupation that, as the sexist saying used to go, “even a housewife could manage”.
But I’m not trying to piss off all the women in Fluther (not again, anyway, and not on account of the antediluvian attitudes that others have had over the ages). Anyone of reasonable intelligence and fitness should be able to carry out the tasks you’ve mentioned. You may have particular requirements regarding such things as the appearance of the garden and exactly how you want house cleaning to be accomplished, but those are still simple enough tasks to manage.
The main thing to watch for in vetting and hiring this person is less “competence” than “reliability” and especially “trustworthiness”. Since this person will be among your private residence, possessions and habits, you don’t want anyone with a criminal attitude – or criminal friends. That’s going to be the hard thing to control for.