If you are new to Bitcoin investment then it is important to have basic knowledge. If you do not understand what Bitcoin is, what is the function of Bitcoin, how does it work etc. If you do not have knowledge in all these things then I would say that Bitcoin investment is not for you. .
After gaining some knowledge about Bitcoin then you can gain knowledge about wallets. Because if you do not know how to invest in Bitcoin then I think it is a mistake to know about wallets first.
Buddy I concur to your last statement and find it being absolutely right, knowing about wallet from the first day as a newbie or intending investor isn't necessary, Bitcoin investment has process,for anyone to be in the said investment and learn, such individual have to follow those processes.
The basics of this investment has to be considered first, you don't have to know much about wallet firstly but gradually you'll know what it is for sure but not necessarily fom day 1, as a newbie your concentration should be how to invest with a good strategy that will be efficient for you, Bitcoin investment is like a school where we started from kindergarten and finally end it in the university where we obtain B.sc to PHD, in everything there is what we call due process as a matter of fact we can not count 2 before counting 1, as a new investor Bitcoin investment itself must sink into your brain first before you can proceed in knowing all about wallet, that's my take on this.