Yeah, I would recommend you read/peruse bogle's little book; common sense somthing (the"little book" series is a set of small, easily digestible financial books published by Wiley and written by various authors) or the little book "The Elements of Investing" by Charlie Ellis and Burton Malkiel. You could knock one of those "little books" out in a day easily.
Personally, I would pay the SL debt back over the longest permissible term, assuming that's a fixed rate, as long as you're not using the deferred payments to consume additional personal property and services.
I would fire the wealth management guys or at least don't give them anymore money if you don't want to offend your parentals. Max your tax advantaged accounts and put other stuff in vanguard balanced index fund if you don't want to devote any time to it. Look into doing nondeductible contributions to company 401(k) and backdoor roth, if interested and permissible under terms of firm plan.
For personal finance stuff, read Mr. MM classics posts. Mad fientist is a great blog for just looking at investment and tax optimization stuff.