Crafting is indeed not that strong early on. You need to find schematics and materials first. After that is very powerful. My biggest recommendation is to try to figure what would you like to do int game out for yourself. Don't be afraid to restart if you feel like you're not enjoying your build.
If you want to go for assault rifle build it's important to get full auto so at character creation go 7 str for full auto, max perception. After that you're pretty much set.
You can go stealth of heavy armor. Both work but for heavy you need 8-9 str and some con. Since you already have 7 str most people go for heavy armor.
https://underrail.info/build/?EAgDBgYMAwZaSwAAAAA3SwAAGVpaKCgyAAAAAAAAWiY5OygVMQFKSUXfvwSomething like this will work.