Not commands as such, though as a fellow "shaker", I've found a small mouse that fits easily under my hand, so the heel of the hand is supported on the mouse mat, and with that arm further supported by a heavily-padded chair arm, helps in things like drawing and clicking on icons for commands. It does get tiring though is the only snag, and can be painful if you have to persist and use increasing pressure on the affected limb joints.

A statement at which much idle speculation can begin among the rest of us...

Alternatively, you could try making the higher hills somewhat larger in size, perhaps, or possibly use some smaller mountains to represent them instead.

As Sue said though, the map looks splendid anyway!

There are a few options for docks in a couple of different styles from the Annuals, though ships and boats in the same package and style are in shorter supply in general. Fantasy Towns from 2021 has all, albeit the ships and boats are restricted to just one of each (two, if you count the varicolor option as well). Symbol Set 5: Cities of Schley has a broader range of options, and there are some simpler design options in the vector style Serpentine City from 2020. I've likely forgotten others though, and hopefully someone else can jump in with other ideas! Of these, Cities of Schley probably offers the larger set of possibilities, though that may depend on what you're looking for, and what sort of styles appeal most to you. Good luck!

Yes, the images seem to be fine now, but they definitely weren't yesterday! Even clicking on the image symbol brought up error messages, after several reloads of the topic, so I've no idea what was happening!

Rivers are, as has been pointed out by others here already, always a tricky subject, and it does come down to what you want from them, and how much work you're willing to put in to each map.

For instance, you can always add hand-drawn polygons along the lines to vary the width more, or help disguise features such as multiple river confluences, or where there's too great a difference in appearance between two stretches of river otherwise.

River mouths at the coast are often difficult as well, which can be overcome sometimes by moving the end of the line so it blends better with the effects along the coast (where that's an option, naturally; best to zoom-in very closely), or again add a polygon of appropriate size and colour to hide the river line end.