Both of our tubs have VERY LITTLE water pressure. Rest of fixtures are OK.
Looking for a do it yourself suggestion or two.

Well you are going to have to tell us a lot more than that.
First, water heaters should be flushed periodically. How often depends on the mineral content of your water. Once a year is probably a good schedule.

Second you said tubs, you didn't say shower heads or spouts or both.

You didn't say hot or cold or both.

Has any work been done on you plumbing lately?
Could a valve be turned off or partially turned off?
What kind of pipes?

Failure to flush a water heater will not affect the flow of hot water.

Tubs only ? Pressure of volume ? All other plumbing fixtures work OK ?
Are those valves on tubs recently replaced ? What kind / type / brand of tub faucets do you have ?

Back to you

Milo