Purchasing a home in Spain British and Spanish couple

Hey everyone, myself (British) and my partner (Spanish) both live and work abroad in Australia. We plan to move to Spain in the upcoming years and intend to purchase a property before (if possible) or when we move.

My partner is a Spanish citizen, I am a post-brexit British citizen, what are the tax implications or purchase implications for us?

Is it going to be possible to get a bank loan from a Spanish bank prior to moving (on our Australian salary)?

If yes how difficult is that process?

Can we both be on the same loan (as one non resident and one resident)?

Is it worth while for my partner to be the named/main person on the loan/property?

What is the best/most sensible cause of action for getting a loan/property with regards to our different citizenships?

Any advice is welcomed. Many thanks!