IKEA built-ins contractor help?

I originally wanted to DIY built-in shelves for our home office using the IKEA Havsta units, but now am doubting my ability to take on this project as a newbie who’s only studied YouTube videos and has vague experience with power tools. Does anyone know a trustworthy contractor who can help me plan and measure out our space and give guidance as necessary? Preferably someone who has experience modifying or working with IKEA pieces. Thanks!!