Currently I am using Electrum and I used to have bitcoincore back a while ago without fully understanding what it is supposed to be and the curiosity woke up again after reading couple of threads here and there, am forcing myself again to have my own and explore it further. Also I barely use my data while paying for unlimited so an attempt to rip off my ISP. 
So if you plan to have your Core as a node and connect Electrum to it, you're gonna need an electrum server, but for this you need a non-pruned node.
If you wanna use it as a wallet, you can use a pruned node with the minimum size because any wallet you will create after the initial blockchain download, it will be perfectly fine.
The only reason why you need a pruned node (in general) is space limitation. If you don't have or don't wanna waste disk space. For any other reason, you won't see any difference between having 1GB prune size or 100GB prune size.
The only difference will be that you will be able to load wallets that you had created deeper in the past. But if you don't have old wallets, then literally just use the minimum size of pruning (or no pruning at all) depending on your disk limitations.