Efficient Use of Wildcards?

This also doubles as “How do I efficiently increase my collection?”

Ive had Arena since launch but only recently started playing so for all intents and purposes I’m new to Arena. I don’t have much in my collection aside from when I opened up the free packs given to me over the years.

I have:

25 Common 32 Uncommon 15 Rare 7 Mythic

My goal is to start upping my collection and as a free/low pay person the only way to do that is to play to get coins/experience for battlepass/mastery which I can then use for packs/events/draft (I’m not sure which are better so I’m looking for opinions on that as well).

Which format is more efficient for me to make a meta deck to constantly keep up with all the rewards I can get from dailies and weeklies? Is that the appropriate way to view increasing my collection? Should I just make whatever I want and finish my dailies and weeklies? How did you guys do it when you first started?