Themanofsteel, First I would like to say, I am glad you are learning about your boating equipment even with this situation as it is. Please don't take any of these comments as anything but helpful and/or educational. We all had to start somewhere.
If you have no idea what type bearings and seal you have, take the good side off and remove the bearings and rear seal and carry them with you to most any auto parts store and buy replacements. But buy replacements for both sides and replace. That way you know for certain they are new and in perfect condition.
Also, search YouTube for how to repack bearings and install bearing races and rear seals and install everything correctly. I say that because it is much easier to see then to explain. But it is not hard to do and easily learned. JMHO!