Hi Nursie welcome to kayak fishing, before you load yourself up with fishing gear,etc get yourself a good life jacket, PFD, and Secure the paddle with a paddle lease then just paddle around till you feel comfortable and stable in your new kayak.
when In safe water and near the shore, tip out and try getting back onto your kayak when its upside down , turning it right side up and climbing back on you need to know this procedure before venturing to far out. Hobie Kayaks have small outriggers that fit on their Hobie kayaks i don't know how they would work on yours.
best of luck ted