As @Charles-Tim wrote, if the OP has his seed, he can very easily recover his wallet, he just needs to be careful not to download a fake wallet because it will empty itself, instantly.
Imho the safe way to go is a stick with Tails OS (which already contains electrum), used always and 100% without internet.
And the actual computer can contain a watch only wallet (made from master public key, not from seed, obviously!).
And yeah, one more stick for transferring tx information between the two for signing and then broadcasting.
It's a bit cumbersome with only one computer - one may have to enter the seed at least 2 times on Tails - plus some learning curve, but it can be done.