If all $8m went into your checking account, the first "simple" step you can do is to start breaking up the $8m into different account types at different banks with you and your wife as depositors for FDIC insurance purposes, in case you are not paying attention or ready to do anything immediate with the funds. https://www.fdic.gov/deposit/deposits/
Then after this, your full time job can become just learning how to manage your money which includes self-education first, before hiring anybody. It is not that hard and I'm sure you can do that on an average, not very hardworking 8 hour day, 5 days a week :)
Since you are a tech manager and seem to know "pieces" of your job (coding and business) but not enough to consider yourself a specialist (like a coder or the business guy), use this same mindset to be a manager of a team you can build around how to manage this $8m. In truth, $8m is not a lot of money per se so you may not need a team ... most people will want 1% of that per year to manage it. Your hope is that they are making at least 1% + inflation rate but you would probably do better yourself.
Good luck and congratulations!