To questions as a beginner,(Ficus bonsai)

[Elizathebonsai]

I’ve had this bonsai for at least 6 months and I never did any maintenance on it because I was always afraid of “messing it up” well I noticed she’s looking leggy/scraggaly and I want to spruce her up. I’m in Missouri and I have these fertilizer balls. Should I add some on its soil or wait till officially spring?

So I guess my 2 questions are:
1. I don’t know how to trim/train a bonsai. Any tips?
2.can I fertilize now? I see some new growth (leaves) getting ready to uncurl.

 

[Elizathebonsai]

One more piece of info. The bonsai is indoors during fall and winter and on a screened in porch in the summer.

 

[brentwood]

I would wait till it warms up to do much trimming, some fertilizer now wouldn't hurt, but you could do more in the spring. It would love full sun, if you could start putting it out when it warms up. I'd like to see it more strong before styling.

Nice tree