The motherboard is completely fine, if you aren’t planning on overclocking you don’t need a super expensive board. Besides that, ASRock uses decent VRM’s. You’re not going to need heatsinks unless you start overclocking like an i7 or i9. Calling a board bad just by looking at it is not really how it works. Like, Gigabyte’s 400 series motherboards for last gen AMD all looked good with big heatsinks on the VRM’s and cool designs with rgb and such. But they all really sucked, all of them had terrible VRM’s and such, except for the highest end one. So, appearance doesn’t really matter is what I’m trying to say 
Getting an expensive motherboard with an i5, when you’re not going to overclock, over an entry level Z390 with an i7 for Autodesk is outbalanced, my recommendation isn’t. However, if your budget is simply really tight, then you can get an i5 and see if it suits your workloads
But if you’d rather want something that is better than the ASRock and with wireless, then the cheapest motherboard would be…
https://pcpartpicker.com/product/Nczkcf/asrock-z390-phantom-gaming-sliac-atx-lga1151-motherboard-z390-phantom-gaming-sliac
Which is completely overkill if you’re not overclocking, but it does look nice.
Why do you want two gpu’s. Are you going to work with programs that can utilize a lot of gpu acceleration?
And well, like I said, as long as you can get the gpu for a good price
As for psu, well, if you really need at least 750w then I’d say, RM750x