I don’t know your physical specs. nor what paddling type you envision.
So I’ll give you paddle advice based on my quest for an optimal paddle.
Bear in mind my choice is racing.
Start with your height - and if you shoulder to torso is similar length as your torso to your feet.
At that height with body measurements like that I’d say start with a cheap paddle in about the 230 cm shaft length. This will cover a wide variety of boats up to about 24-25" wide and narrower.
If you feet to torso is longer than your torso to shoulder then go with a shorter paddle, if the converse is true go a bit longer.
and if you are less than 6ft go shorter the paddle sizing guides are a OK place to start but will not give you the right paddle for you but will get you close enough.
Next you need to determine if you are high angle or low, if you are low you may want to start at 235-240 if you are high angle then you may want to go 225-230 somewhere in there… and figure on a blade surface area of 600-612 Cm2.
A high angle blade will be shorter and wider and a low will be longer and thinner.
from there you need to determine what you want to paddle for
Touring - that paddle won’t be optimal but it’ll give you a good place to start.
Floating about or lazy river paddling - It’s fine.
Racing - it absolutely won’t be right for you.
eventually you’ll figure out if you need to be longer or shorter based on your paddling style. and you can ditch the box store paddle and get yourself a decent paddle.
but don’t listen to anyone who says start with the most expensiveist paddle out there, they have already figured out their shit. so rather than throw a ton of money at a paddle that I guarantee won’t be right for you get the cheapest one you can find that aligns with your height and paddling style. form there pay attention to what you are doing so you can determine what changes will give you optimum performance. then you can start to spend money on better more expensive paddles.
as for boats, figure out what you intend to use it for then ask. for advice. based on some more datat points I think I can give you pretty good advice. and since I’m a miser I try to do everything on the cheap.
but first tell us about you physical dimensions what you envision to be paddling and where. as it all matters.