I have research the web for solutions, one of witch is finding my private key and importing it to a wallet such as electrum. I dont know how to do this, and I find it a little scary to trust some of the sources that explains it.
Right. That will solve your problem.
Electrum is SPV wallet and you don't have to download the blockchain.
Electrum is an open-source wallet. It's secure.
Make sure that you have downloaded it from
its official website and do not forget to
verify your download.
If you want to be completely secure, you should create your electrum wallet on an air-gapped device.