Garden design

I moved into this house in September last year and I would really like to change the garden. I need assistance with design. I love wildflowers and pollinator plants but I also want a garden lawn. I will be removing the green house and the little brick building and also all the bushes which are to the side of the fence. I am thinking of having a native hedge against the fence with some trees such as Rowan tree. Ant ideas what I could do with the garden? My budget for the actual work isn't great and I will be mostly doing it all by myself. I need someone with ideas. I can simplify them when it comes to actually doing it. I will be upgrading the patio and replacing the timber supporting wall with brick wall.