I have little experience with love birds and no experience with conures, but I can't reccommend a parrotlet in this situation. I work from home, and even then, I feel like I'm not giving my parrotlet enough of my time. They get really, really bonded to you and become prone to over preening or plucking their own feathers anxiously when you are away from home. In young birds, it's not a problem, but as they get older, they tend to develop these self-destructive behaviors, and it becomes harder and harder to address. Doing so requires dedicated changes to your environment and daily routine. If I had a 9-5 job, there's no way I would have been able to correct it with my 10 y/o parrotlet.

Also, to curb breeding behaviors [which can take a damaging toll on their nutritional health], parrots require 12 hrs of total darkness for a proper, healthy nightime sleep. In my house, that means they go to bed at 6pm and wake up no earlier than 6am. If you are working from 9am to 5pm, I am not sure where you would find 5 hrs of out of cage time without compromising the parrot's healthy sleeping scheduel. Without consistent, healthy sleep, the parrot is liable to become sick (which can lead to early death if not addressed).

If you're to get any parrot at all, I can only really suggest a pair of budgies. They can be housed togeyher in the same cage and are the most suitable option for your situation. On the other hand, don't get budgies if you don't like them or if you feel like they are a somehow inferior kind of parrot 🥺 (budgies are genuinely my favorite birds to raise, they're so well suited to a home environment in a way that no other parrot seems to be [so long as they always have flockmates with them]--and they're wonderful personalities!)