First, this is NOT a "simple" relational database application, so you need to adjust your expectations.
Second, ALL good relational database applications start with a proper table design, based on the principles of Normalization. So, your video research should focus on that in the beginning.
And finally, asking someone to take this on as a volunteer might not attract a lot of competent offers. Professional developers must make their living doing that, and amateurs, who might offer to do it for the experience, might not be that capable. To be honest, if this is a tool you intend to use to support a real business, I think you'd be far ahead to hire a competent Access developer and pay them for their expertise from the start. If this is a hobby or practice or school project, of course, investing your time in learning how relational database applications work is a good way to get started.
Have you searched for samples or templates to help you get started?