I see the chipset is kind of getting to you, I always had a problem with northbridge southbridge differences but it is not that important. Choosing a chipset for your CPU and RAM can just be features, such as 1 or 2 M2 slots, 4 3.0 USB ports compared to 6 3.0 USB ports, better sound features such as 7.1 or 5.1 audio, also how many Sata ports.
I would just look for what you want:
Do you care a lot about onboard sound: check the onboard sound chipset in a review.
You should not need more than 6 Sata 6.0 ports.
you should try and shoot for 2 M2 slots for upgrading later on.
You should not need more than 2 16x PCI express slots and a 1x to 4x PCI Express for later expansion.
You should try and get a max RAM of 64, while its not that important for a long while but it does give you some headroom for later.
I would not bother with overclocking too much as guppycur says it not that important to have great overclock options for a first time build and most motherboards will let you overclock just a little without worrying about anything overclockers do, including voltage and watercooling.
Then google the chipsset and look mainly for reliability over slight performance. You really do not need that $700.00 Asus board. A lot of brands of motherboards look to reliability over performance like Asus with their "tuf" thing they have. So read some reviews on newegg and check out the chipset according to the socket for reliability. Your CPU will gauge performance along with the amount and speed of RAM the motherboard just throws out features catering to ether performance or reliability and also each one adds a little of this or that, like 4 3.0 USB ports where one will 8 Sata ports and so on.
There is a few things to think about,
The MSI MicroATX motherboard has a 8 pin ATX plug and a 6 Pin ATX plug and I checked a lot of power supplies and there is usually an 8 pin and or a 4 + 4 pin cable. So check to see the plugs that are needed.You will get the 20+4 or the 24 pin every motherboard needs but I guess now there is 2 ATX power plugs, do not buy one with a 6 pin plug, it will be hard to find a 6 pin cable on a power supply.
Also try and find a motherboard with good placement for the RAM, this will help you upgrade your ram without removing your heatsink
I hope I did not confuse you or anything, its just something to be aware of.
I used to check this out:
https://www.newegg.com/tools/power-supply-calculator/?nm_mc=KNC-GoogleKWLess&cm_mmc=KNC-GoogleKWLess-_-Category-_-PSU-_-PowerSupplyCalculator-2019&s_kwcid=AL!5844!3!302382823366!b!!g!!%2Bpower%20%2Bsupply%20%2Bcalculator&&s_kwcid=AL!5844!3!302382823366!b!!g!!%2Bpower%20%2Bsupply%20%2Bcalculator&gclid=Cj0KCQjw0IDtBRC6ARIsAIA5gWuN-spMyr4f5orp6xnXWQTC2wHAvwlGk5llBJjXntc5gI4FjvAmHCEaAkKoEALw_wcB&gclsrc=aw.ds just add 100 or so more wattage and you will be safe but as you said it would be better to have a higher wattage power supply than a low wattage one. I know this from experience when I bought a crappy PS and it would not keep my PC running.
From the picture I uploaded I have a massive 1200 watt power supply and while I know its not necessary for the PC I have it was for a better PC I had before and why not be safe than sorry in the power supply pick. Its a bummer when you look at you voltages and you see low dips and it can get to the point of where your PC will shut down.