The main problem i have had with printing minis has been getting the supports off of the print. FDM seemingly generates more support material than resin printing, and because the figure is as small as it is, it is quite difficult to get any tools in there to get the support material out.
Since you guys are new I would like to direct your attention to the following excellent resources:
As someone who likes to build their characters ahead of their current level I too prefer Pathbuilder, though for new players Wanderers Guide might be a bit more hand-holdy.
I believe both of them can output a pdf of the character sheet if you prefer to play without tablets/phones, and both can handle at-table play, though for Pathbuilder specifically I would recommend a tablet/laptop over a phone, because the website is a bit more friendly for at-table play.
Foundry is the only vtt which is regularly recommended for pf2e pretty much everywhere. It had excellent integration from what I hear (though I haven’t tried it myself other that a one-shot)
I would recommend starting over at Lvl 1, because characters get quite a lot of options over the levels, so starting with only the Lvl 1 options can simplify things quite a bit. Though I know that some people have done a “You are depowered for some reason” or “You are dreaming of a time when you weren’t as strong” period to somewhat quickly level up from one to where you were. If you do this, be aware that characters will end up differently than your 5e versions, and that pf2e expected certain magical items at certain levels, such as Potency and Striking runes for martials and Wands and Staves for Casters.
I think you meant “powers of two” not “square numbers” near the end there