When should I buy a new sword?

[jojo]

Hi, new to this, hope this is the right place to post, didn't see a "beginner" area. I'm wondering if I should buy a new sword - I have enough money and high enough level to buy several - but I don't want to if it's only going to be a little better than the default one I have. However, I don't see any way to view the default sword's specs (likewise for default anything for that matter). Didn't find anything in any beginner's guide/user guide/wiki. Appreciate any info.