Welcome to the addiction!
You bought a nice camera and housing. You said wide angle shots are of interest to you. Wide angle shots mean lots of light spread over a large area. That directs toward more powerful strobes set a good distance apart.
If you buy 2 smaller strobes, you will get some degree of coverage and light but not as much as you will want with time. If you buy a single more powerful strobe to start and limit the bank breaking, you will be half way to what you will really want. If you buy the smaller ones, you will still be 100% of the way from your ultimate goal. I started with the smaller strobe path and spent more in the end. Hoping to keep you from that mistake.
If going new, I would buy an Inon Z-330 with an 8" and 5" arm plus floats to provide lift. If you can find good used Inon Z-240's, that would work great. But you cannot tell how many shots have been used with those strobes. Some people sell the Z240 to upgrade tot he Z330. I would buy the Z330 and save up until I could afford the second one.
There are other brands of strobes that sell good, powerful strobes at similar or higher cost. I am familiar to Inon so I will stick to discussing that brand.
The other brands can be just as good or better and others will likely chime in to discuss ones they know about.
Hope that is some help. You will find your 2 strobe will cost more than you likely spent on your housing. YIKES!