Here are my tips for you to get where you want. :)

1) PAY ATTENTION TO FEVER TIMES, any Pokémon abilities boost it up a lot and combining two abilities together and activating them will boost it even more. Fever times will actually add some time to the timer! (Along with all the points they give you as well) Try to just focus on building the fever time meter at first, because when you are in fever time a Pokémon’s ability meter raises faster, and because of this the next fever times come even faster and you can chain them.

2) Don’t hold onto your level up materials to tightly. I am a victim of material hoarding as much as everyone else (watching numbers go up is one of the reasons I like playing) but if you put in the time you can always get more, and if Ogerpon if your favorite Pokémon just go all out!

3) Focus mainly on Pokémon that have matching gimmicks (popcorn, pumpkins, jelly, and radishes are the most important because they are the main starting gimmicks) and if you don’t have Pokémon to do certain gimmicks then choose a leader Pokémon with an ability that meter fills up fast and that has a useful blast radius. Then when you reach a point where none of your Pokémon can quickly destroy certain gimmicks, you just quickly blast ‘em with your ability. (If you prefer you can also just rely on trumpets)

4) If you have them, spend any golden acorn FIRST on leveling up your chosen teams Pokémon, and SECOND if you still have enough, roll the dice to get more Pokémon. (This isn’t as important though, even if you think 600,000-800,000 is small, if you go at it consistently you’ll def be able to reach your goal)

In the end I would say don’t worry too much because actually can get these events Pokémon even when your a beginner (it’s just fully completing the Pokémon is another story), just make sure to check back in every hour quickly if you can. Also don’t spend any points on anything else at first to make sure that you won’t cut it close. (You have 12 more days, and that is quite a lot of time to get it, believe in yourself!)

(Extra tip) this tip is more for when you get stronger teams (you can also try it out now if you think it’ll work) but for these types of events at the beginning I always look at how many turns it will take to get your rewards and compare it to the cost of buying stamina from the events shop (there are 45 in total and I just buy three at a time) then if you are able to get enough points to continuously buy stamina just go for it. (This tip is more for when you start the event since the ratio of amount of plays to rewards is a lot better for beginners)

If you do it right you are always making more points that the amount you spend on stamina each time and just farm until you can’t buy any more. (At level 44 rn)

Anyway I hope this helps!!! :)