how to use openstreet map after downloading other updates

Now my garmin doesn’t work good anymore. I can’t find any adresses anymore. So now i want to use openstreet map. What do i first have to delete before using it. Ans how can i download the maps fron openstreet on my garmin?

Thank you, kind regards,

Using openstreetmap doesn’t improve the search for adresses, it’s better than it used to be but stil not very good.
That you can’t find adresses in your Garmin GPS is a software issue, what kind of Garmin do you have?
Which maps are installed on the gps and which are active?

Don’t delete anything, aspecialy if you don’t have an outdoor gps.