I know every Order\congregation was new in it's first time but, today: Are new groups per se bad? in latin-america there have been a lot of very new, small, but seemingly great groups eg; "misioneros ermitaƱos teresianos" (theresian hermit missionaries), new monastic, missionary groups etc if I want to discern any kind of religious life: am I better off ticking those group off and sticking with seeking out stablished groups?
I don't think new communities are "bad" or established ones "good " per se. But my thoughts are that established ones probably have more of a structured formation and discipline which may be most important while you are discerning? I think in this stage of your discernment, it might be best to have solid footing. Once your more grounded, you can explore more. You are in my prayers as you go through this process. You already show great courage in considering your vocation! Peace!
I have been very impressed with Home of the Mother religious order. They have quite a presence in South America. Sr Clare Crockett was a member. Several of their priests have a podcast called Fireside with .the Fathers. They are relatively new but growing.
Even the old Orders were new at one time, but I understand your caution. Then again some of the old Orders seem to have lost their way. Sorry, I'm not very helpful.
I think one of the things I would look for is the charism of the order and if it fits in with whatever calling I feel drawn towards.