If there is no new plumbing involved, then installing an acrylic tub should be straightforward, and anyone who is comfortable with DIY should be able to do it. It’s important to always read the instructions thoroughly as all bathtubs are going to be different. If you need to alter the pipes for the faucet or the drain, then installation can start becoming more difficult, and it may be best to call a professional. If you are installing it, then making it level is crucial as otherwise, it won't drain properly. You want to connect the pipes with extra care to avoid any issues, and using plumbing tape is always a good idea.