I've grown maidenhair ferns and many other ferns successfully for years. Some think that ferns need more care indoors because they seem fragile some of these are tough plants and once they are happy were they sit many only need misting and not every day some do some don't and that is dependent on how humid its surroundings is. My method is first your plant needs to sit on rocks or pebbles in a wider container under the pot so that all the leaves can benefit from the moisture rising from the bottom or group your plant with other plants that like the same lighting this helps to add humidity to the leaves. I found that they don't like to be moved so once you decide where your plant is its happiest don't move it but it can be turned for even growth. Never fertilize new ferns give it a couple of months or more to get use to its new surrounding and you can get use to its needs and when it time to fertile make the solution weak. When I started growing ferns I went to the botanical gardens and greenhouses to see how they grew and cared for ferns this is where I got a lot of great information on how to care for ferns and picked up some rare ferns and spores not found in stores but that was back in the 1970's. Your fern looks great I hope that is continues to grow healthy.

This looks very similar to a fern of mine that was being sold as a 'green fantasy fern' when I bought it, but I've never been totally sure that it was correctly labelled as there doesn't seem to be much information about green fantasy ferns available. The browning and yellowing may be due to underwatering, a lack of humidity, or being placed in too-bright sunlight and getting scorched. I keep mine in a bathroom for increased humidity, where it gets bright but indirect light, and it seems to be doing well. And yes it can be kept as a houseplant! I've had mine for nearly a year and have always kept it indoors. Good luck with your fern!

Old fronds tend to brown off, die and are replaced by new. The new fronds are lighter in colour and darken up with age. As long as it's following that cycle and the fronds in between look good there's nothing to worry about.

I have one also. It was beginning to have brown tips until I bought a humidifier