Ds1 upgraded his ram no bother with his tower PC.
In terms of what specs to look for, it is important that you can't trust the 'can my computer run this game?' Page of the game website.
If I believed that, my work laptop could run Enlisted and it really can't- the graphics are too complex.
There will probably be reddit threads about running x game on y set-up. That's possibly more helpful.
I am irrationally prejudiced in favour of intel i7 processors which I believe to help computers think better, but I will acknowledge the lack of logic behind this. If you see something advertised as a gaming pc and it has an i3 processor, however, this will be unlikely to function well. i5 is ok.
The irrational part is that other processors from different manufacturers are probably just as good but I can't bring myself to trust them.
Same with graphics cards.
There will be lots of reviews for specific ones online.
As above though- just now it is probably better to get someone to build one because they will know what's easy enough to obtain just now.
Or i did get lucky with getting ds1's from cex.