Database Design: ERD Review or Creation

We are designing the database behind the app described in BringBizBack.com. We are designing a database for MySQL 8.0 using the Entity Relationship Diagram (ERD) tool [login to view URL] We need an expert at database design. Look at our design and help us eliminate mistakes and optimize it. Perhaps if what we have now is really bad you just need to remake it from the beginning. We can give you access to our LucidChart ERD but we've attached what we have currently. But we want you to finish the design ASAP. We want to do what is the best and most common way to do things using ISO standards if possible. In particular: 1. Did we create the best tables (entities)? 2. Did we create the best fields to collect or do we need more/less? 3. Did we label fields correctly? 4. Help us label the data types of the fields correctly. 5. Are the links correct (ordinality/cardinality)? Three ways to win our bid. A. Reply FAST. Now. B. Give a GOOD FIXED PRICE for finishing this job. Not hourly. If your price and quality are really we will probably give you more business. Hiring people is hard so we stick with good people. C. If we work well together we will probably want to work with you more but DON'T TRY TO CHANGE our bid into some other project like building the whole app. We will bid that separately, maybe. Just bid on building our ERD/Designing our database.