Here's a tutorial for you! https://www.u-createcrafts.com/creative-guest-tree-mural-by-vintage
Hi Deborah, here are some ideas I hope will help you paint the trees on your wall. Paint a Tree Mural: 8 Steps (with Pictures) - Instructables
Paint a Tree Mural: We're in love with paint around here and recently decided that my daughter's room needed a tree. All of the instructions I found around the ...
My husband is an artist and he recently was in touch with a cousin who well remembers a mural my husband (as a teenager) painted in his family's restaurant. I would actually go to the local high school and find a talented teenager who could help you with this.
You could project an image on your wall (you can do via your cell phone https://www.youtube.com/watch?v=Tx4vPeL9y2g) Unless you have some experience drawing and using color, you may want to begin with just a silhouette and use just 2 shades of color that are neutral or "play well together". Good luck!
Yes you can use a projector unless you know someone that can do it freehand.