I need gardening help. Like a lot.?

So, im starting a garden close to my condo, right up against the wall actually. It's shady around there for most of the day. I have never gardened before so I need a lot of help. But I'm getting paid, so. Anyways I don't know much about gardening but I look at this patch and it needs a lot of help. I don't want any egetables, and I want lots of colors, and only annuals. The dirt looks awful. So how do I make that better? I know I gotta get rid of all the weeds first, and theres also a shrub just awkwardly there in the middle of the spot. Do i have to get rid of it, or can i just plant around it? Basically I need help with everything step by step. Like how to make the dirt better, what types of flowers are best, what type of soil to use, how to use mulch, basically tell me everything you know. Act like you're teaching a 8 year old because I really know nothing about flowers or gardening.