pact of the archfey warlock/swashbuckler rogue tabaxi

im gonna play a level 1-20 campaign and my character is a tabaxi who is trying to revive the hope and faith in fairy tales... and by extension revive the fey who died in a war several thousand years ago, we get to have a starting feat, and i rolled an 8, 17, 15, 12, 11, and 16, i just want to know what the level split should be and the strategy for in and out of combat scenarios (plus this is me challenging myself to play the new 2024 module so might as well test the waters)