I was looking at a bunch of fancy European brands but I think I like this the most
Don't do black, it looks cheap and gauche on 95% of people and with 90% of materials. If you want ‘black’, get charcoal instead.
Dark blue is THE first color suit you buy, unless your personal taste and coloring means a mid/dark grey is a better option.
Other anons 10000% correct that the most important thing is to get it tailored. Even just a little work on arm and pant length can make a world of difference. Don't forget about your shirt, though- it won't matter if you perfectly tailor the jacket only to wear a XL shirt with sleeves ruffling out inches past the end. You end up looking like a toddler. Make sure your shirt (white, light light grey, or light blue) fits just as well.
I have worked for a few different fashion companies, what's most important is not necessarily a bespoke custom suit, but rather that you pick a cut that fits your body type. Don't go to Banana Republic when you're fat, simple as.
Other anons have good answers but I would avoid indochino, I have a suit from them and have had a store pretty close but I think they tend to look cheap, and also take a lot of time.
Brooks Brothers is a good choice, they have more traditional 'boxier' fits that accommodate larger builds well, and also can look really dashing on slim guys. You don't want to be one of those fags wearing a suit bursting at the buttons, good jackets have room to breathe and should still have the second button hole sitting over the button when you button the top.
Do not get a double breasted suit, they look cool but are unpopular in the US and people will think you're a pimp, it's not the right look for court. Traditional two-button is the correct option, and for shoes/belt always make sure they're a less loud color than the suit. It's difficult to go wrong with black shoes, warm browns and blues are a great combo but you first want to look clean and professional, not stylish.
For material, wool is best this time of year, and generally is your go-to. Absolutely do not get linen, if anyone is even selling it rn, and while cotton or cotton blend isn't bad, and can be lighter, wool is best.
In terms of patterning on the suit, you want something, because flat color suits look cheap. Too much patterning locks you on what you can wear it with and looks less professional, what you linked is good but if it's you're only suit, I might recommend a heathered look instead. Subtle, classy, and (most interestingly) keeps the suit 'one' color while letting you style it as two or even three.
There is no wrong answer for matters of taste but for matters of fit you
must get something with a fuller cut or you will look like you're being squeezed into something too small for you, and even if you aren't fat you look fat. See gavin mcinnes, sporting multi-thousand dollar custom fits yet all people see is "you look pudgy bro"
color coordination also matters, socks and belt must match obvs, and if the shoes are black, socks better be too. if you go for brown shoes, a great and subtle but appreciable detail is matching your socks to your tie, particularly if the tie is a nice, single, less loud color.
nordstroms isn't a bad option, suit supply *can be* good, i dislike men's wearhouse but well-dressed (if not neccesarily fashion-forward) people I respect do, don't touch joseph a banks. J. Crew's crosby cut would be a really good fit for you, and they’re always running some kind of sale, that might be my instinctive choice.