I need help and advice

I adopted a dog from the humane society 8 months ago. She’s currently 10 months old. She is a large breed, Doberman mix. She currently weighs between 45-60 lbs. I’m struggling with her and I do not know what to do anymore.

I know she is high energy. We spend hours outside in the backyard and go for walks. She goes to daycare multiple times a week which is located on a farm where she runs and plays all day. I’ll feed her food in puzzles to stimulate her. I’m doing everything I can to get her energy out but she still tears around the house barks out the window, barks at me, jumps, doesn’t listen and all that.

I’m starting with a professional trainer soon however I’m honestly embarrassed to take her to the group training as all she will do is pull me off balance, bark and jump and I won’t be able to control her.

I feel like I’ve failed her. She was in puppy training when she was younger and I kept up with training afterwards but now nothing I do will work. I genuinely want to return her to the humane society (I never actually would but I dread waking up and having to deal with her behaviours). And I would if I wasn’t in love with her. All I want to do is cry. I just want a well behaved dog and I don’t know what to do. Again I feel like I’ve failed completely and will be stuck in this forever.

I truly love her more than anything which makes this all worse