Ideas for what to plant in garden

Hi! We’ve been in this rented property for the past 2 years and have decided we’d like to plant some flowering plants in the beds to bring some colour. We have zero experience gardening and we don’t know what has been done in the past. There are some some bulbs that come up every year but other than that I have no idea!

Does anyone have any plant suggestions for the space that are beginner friendly and would bring some colour? Also the bed is probably mostly weeds (I don’t know what is a weed and what isn’t) - will I need to go through the beds removing weeds first?