Here is a good video I found that should help you out.
Has a hole in the roof that I need to fix once money is available.
Plan is to build a u shaped workbench where that table is which basically will be a 8 foot x 30 inch mechanical workbench where the table currently is, and a similar electronic workbench next to the window with a 8 foot x 2 foot counter facing the garage door.
The door on the right will remain functional and I hope to add a handy lift for the riding mowers.
The door on the left will be closed off to mount a window ac and a walk in door with air compressor, parts washer, etc. near the electric panel, and a push mower lift near the walk in door.
Where the current wood shelves are at will be parts storage with consumables on those 3 shelves, and peg board on the wall for clam shell type stuff and I will put the majority of parts on the inside as there is another door providing access to that room.