With L we found she got more sleep overall if we capped her nap. Keeping a longer nap meant much shorter nights.
Having said that, many LOs don't like having their napped cap and so a shorter night works better. Some parents also prefer a longer nap and later BT. It can be a bit of trial and error finding what works best for you.
Maybe U should just start with later bedtime. Putting him into his at 8 instead of 730 and starting bedime routine later at 730.
Yes, this could definitely be a good place to start.
Let us know how you get on.