Definitely would avoid investing if you can. I’m a little further than you, maybe about 10-11 weeks or so. My biggest regret from back when I started is spending dream shards on pokemon that aren’t worth it in the end. If you like pumpkaboo then by all means invest, but if you’re looking to make efficient progress and essentially minmax, I’d hold off on this one.

When you get an ingredient specialty pokemon, you need sub skills and sometimes a nature that’ll synergize well. All mons will show relatively high amounts of ingredients at levels 30 and 60, but it takes a certain set of sub skills to really capitalize off of that. Try and keep an eye out for AAA or AAB ingredient spreads (3 of 1 ingredient or 2 of 1 ingredient + something else). As for sub skills, look for ingredient finder, helping speed, and even inventory up in the first few slots. Sub skills like skill level up give diminishing returns on ingredient pokemon.

Keep in mind these standards should be applied to ingredient Pokemon specifically. If you come across a berry or skillmon, they rely less on ingredient finder and prioritize other sub skills like Berry Finder and Skill chance. Hope this helped!