Congratulations!
For the investing part - you can DIY invest in your corporation. I use Questrade in my corporation, it was easy enough to setup. Canadian equities are fairly tax efficient when invested in a corporation (something like VCN).
To get money out of the corporation - you'll want to pay yourself dividends spread out over many years. Make sure to use up your lower tax brackets every year.
You'll definitely want a accountant, the taxes involved in investing in a corporation are much more complicated than doing it personally. Hopefully your accountant has dealt with similar situations before (for example, retired doctors with a stack of cash in their corporation)
As for the financial adviser... I stay as far away from them as possible. I suppose one benefit could be if they understand which investments work better in the corporation and which work better in your personal accounts - for a slight tax advantage. But... the benefit of this would still be way less than their fees, and most financial advisers wouldn't do it correctly anyways.
One resource that I like that deals with investing money in Canadian corporations is looniedoctor.ca. For example
https://www.looniedoctor.ca/2018/07/27/professional-incorporation-benefit/