Greetings,
I didn't make the proper research on how to choose the correct wallet for me, and I ended up choosing Bitcoin core, sadly I have 3 years and 14 weeks behind of sync, which is ridiculous.
That time is not how long it will take to sync the blockchain, but rather that the newest block Bitcoin Core has is dated 3 years and 14 weeks ago. A full sync, depending on your hardware, can take anywhere from a few hours to a few days.
I made some research and I found out I can download from torrent to decrease this waiting time, as of 2015 I found a post that said that at that time the size was of about 90gb, this in 2015, so I don't even want to imagine/find out the size of the download today.
The torrent and bootstrap.dat file are useless as it will take longer to sync with them than it will to allow Bitcoin Core to sync normally. The blockchain is currently ~110 GB.
The point is I made a really big mistake, and choose a wallet I can't afford to have.
The problem is I have one wallet address I created with bitcoin core, and here is my question:
Can I open that bitcoin address anywhere else? If so, where?
You will have to export the private keys from your wallet and import them into another wallet.
Also, what wallet do I choose to create? Where do I go to create a wallet that I can access and make transactions whenever I want/need?
If you don't want to wait for the entire blockchain to sync, you can use a lightweight wallet like Electrum instead. However you will be giving up some security and privacy for convenience.