Ebay shop overhaul

i am looking to switch our ebay store back on, after limited sales through this platform.

We are a company that offer many items and things that we should be selling through ebay, but just either haven't got the time to list items and promote and also i just dont understand the whole ebay, Amazon thing.
we already have a shop, but have not used it much nor have been promoting like we should.

we should have the following categories.

Our company and shop is Mr Batteries Ltd

Starter Batteries
Leisure Batteries
Victron Energy Products -
Solar - Panels - Ridged , Flexi, Accessories
GYS - Battery Chargers, Battery Support Units, Battery Start Packs, Welding equipment, Welding Safety, Heat induction
Lithium Jump Packs
Kartt - Inverters, inverter / chargers, Diesel heaters
Pundman water heaters
Cables and Accessories, such as fuses, Cables, fuse holders, relays, breaker switches. and more.

So quite a bit we could be dong and currently we have nothing on sale.

Is this a project you would be interested in.

Best regards

Mark