Welcome to Gods Unchained, it is a good decision that you start playing this game. This game is fun and at the same time, you can earn from it and you can also earn by blogging it on Hive (like what you did here).

I'm unlikely to withdraw what I win in this game, so all my loot will be to acquire new cards and increase my collection even further

Good decision, keep them and buy good cards.

Another thing, if anyone knows of a good and cheap deck to start with, could you leave the code so I can look?

Check these very cheap decks:

GU_1_6_ICPICPKCxKCxIAVIAVKDAKDACDZCDZIDZIDZKBdKBdICOICOKBfKBfICBICBIDbIDbICDICDKBpKBpHAiHAiKDJKDJ

GU_1_6_ICPICPKCxKCxIAVIAVKDAKDACDZCDZIDZIDZKBdKBdICOICOKBfKBfICBICBIDbIDbICDICDKBpKBpHAiHAiKDJKDJ

GU_1_6_ICPICPKCxKCxIAVIAVKDAKDACDZCDZIDZIDZKBdKBdICOICOKBfKBfICBICBIDbIDbICDICDKBpKBpHAiHAiKDJKDJ

GU_1_6_CDCCDCCBZCBZHAbHAbIAVCCXCCXCDmCDmCDZKBkIDZCDqCDqCGPHAhHAcCDPIAcIDbCBrIDoCBCCDwCCxKBiMAgHAi

I got those decks on this website https://gudecks.com/ go and check it out.

And these are my less than $20 War decks:

Achieved Ethereal Diamond
GU_1_6_CBaCBaCCXCCXHAFHAFHAgCDBCDBCDZCDZCDqCDqCDzCDzKBcKBcCAZCAZHAcHAcCBCCCjKBiKBiCAXCAXHAiCBAIDr

Achieved Ethereal Diamond
GU_1_6_BDyKBjKBjCBaCBaHAFHAFCDqCDqIDjIDjCBBCBBOAGOAGCAZCAZKBvKBgKBgHAcHAcKBhKBhCEcCEcBDJBDJKBiKBi

Achieved Ethereal Diamond
GU_1_6_BDyCBaCBaKBjKBjHAFHAFCBBCBBCDqCDqIDjIDjOAGOAGCAZCAZKBgKBgKBvHAcHAcBDJBDJCEcCEcKBhKBhKBiKBi

Achieved Ethereal Diamond
GU_1_6_BDyCBaCBaKBjKBjHAFCBBCBBCDqCDqIDjIDjOAGOAGCAZCAZIDkKBgHAcHAcBDJBDJCEcCEcIDmKBhKBhKBiMCfIDr

Achieved Mythic
GU_1_6_CBaCBaKBjKBjBHMBHMCBBCBBCDqCDqIDjIDjOAGOAGCAZCAZHAcHAcCEcIAZIAZKBhKBhKBiKBiCCLCCLMApMApIDr

Good luck, and just keep on grinding to accumulate gods.