I have packed and moved myself a few times. Few tips I always pass along:

When renting the truck, use the company's national 800 number to reserve a truck with the local office. Seems you always get a better price with their franchise agreed rate than just calling the local guy directly.

Hire some labor to help with loading and unloading all the heavy boxes, furniture, and pins. You can select guys with the best feedback on sites like https://collegehunkshaulingjunk.com/

You can get free used moving boxes on your local craigslist, and after your move, put your boxes on craigslist and someone will come remove them for you as well.