It is hard!! I feel like I am racing the clock, as I am 43 years old. I’m a convert - have felt a pull towards the religous life since I was little, but have only been Catholic 3 years. God will get me where He wants me to be, though!!
I think I’m kind of in the same boat. I’m also a convert (joined last year), 32 years old. Since I was a young teenager, I’ve felt called to prayer, or to pray more (it happened after a semi-religious retreat/camp - it wasn’t Catholic, though…

- semi meaning that only 5% was focused on scripture readings), but since age 5, I always knew I wanted to be a computer programmer, which I am (for a state agency that helps people with disabilities). I’ve always felt like I could do something more, and I would love to have more time for prayer. Hearing certain family members downstairs carrying on and using the Lord’s name in vain when watching TV shows, or watch TV shows that make fun of religion (like that one cartoon), or even listening to family members go on and on about New Age stuff (they’re not heavily in to it, but they do believe that it’s true) while leaving me to feel like I’m being mocked and ignored when I try to tell them that those beliefs are incorrect, doesn’t exactly help the prayerful athmosphere… but I don’t want to be a nun/sister (if that’s what I’m called to be) just to ‘escape’. Right now, it’s still a curiousity about religious life, and a lot of “what-ifs” between my job, and discernment, and I don’t want to burden a convent with medical issues (nothing major, just I’d always need hearing aid batteries, periodic hearing tests, strong eyeglass perscriptions… and the fact that I have allergies - a convent deep in the woods/fields might not be a good idea come Spring.). One thing I’ve heard is that people could be in discernment (going through the postulancy, temporary vows etc., processes) for 6 years and then be told that they’re not called to be a nun/sister. The other thing is habits. Most orders seem to have partial, or no habits, and they seem to be the orders where 90% of the nuns/sisters look 70 and older (meaning, they might not be around after 30 years). There’s also a little intimidation factor in that it’s like trying out for the Big Leagues.
Then there’s finding what I’m drawn too. I’m drawn to the Rosary, Divine Mercy, brown scapular devotion (thus Carmelite), praying for the souls in Purgatory. Basically, prayer, and some light church work, or convent work, like making breads, candles, etc., and working out in a (medium sized) convent garden. I’d also prefer an area that’s semi-rural. Not rural in the sense that you have to travel 50 miles to say “Hi” to your nearest neighbor, but far away enough from a town/city (few miles or so) that you have several dozen acres of land where the convent is.
So, yeah, I guess it can be hard. I’m kind of leaning towards Discalced Carmelite, or Franciscan (Poor Clares), and maybe Benedictine. I don’t think I’d do well in an order that focuses on health care, social work, teaching, missionary work.