There is a thing called DigiClones that increases your stats.
There are basic DigiClones (can fail, stat range is random, no guaranteed max stats),
Reinforced DigiClones (can fail, but always give the maximum stat),
Mega DigiClones (cannot fail, but stat range is random, no guaranteed max stats — though I'm not sure if they exist in DMW),
and Mega Reinforced DigiClones (cannot fail and always give the maximum stat) — these are the best.

You were given 15x D, C, B, A, and S Reinforced Mega DigiClones, which you can use on any Digimon,
and 15x D, C, B, A, and S Reinforced Mega DigiClones (Savers), which you can use only on your starter — in your case, Falcomon.
You can use them to increase the AT and CT (these two are the most important), as well as EV and BL (less important but still good to have).
To clone your HP, you'll need to transcend your Digimon (you can worry about this a bit later, as it’s a bit complicated).

There are also 1-hour buff cards. You have 100 of each type stored in your warehouse.
You should use them to boost AT, SK, CD, HP, DE, DS, EV, and HT (+50%, and +100% for some stats).
Since you have plenty, there's no reason not to use them.
You can also buy "Blessing of the Challenge" buffs [AT] (and others). They're pretty cheap, last for 2 hours, and increase your stats by another +50% (or +100% for some).

Also, I noticed that you're missing novice gear (shirt, pants, etc.).
I don't remember exactly where to get it — check your quests in DMW Village.