I wouldn't do 5 tiger barbs in a 10 gallon, IMO they are just too nippy and aggressive for quarters that tight. I would go with more peaceful fish you like. Ottos are good, but wait until your tank is established/cycled/and has at least a little algae in it. New tanks just aren't a good idea to place them in, they need to constantly graze....even then they might need to be supplemented because they wipe the tank clean pretty fast, especially in a smaller tank. I would go with a nice school of community fish in a 10 gallon, then later add the oto's. JMO. Good luck with your first tank. Your tank will probably come with the stock fluorescent lighting (15 watt bulb, 18 inches long) and you would be able to grow Christmas moss, anubias, some crypts, or java fern...That's what I had with my first stock 10 gallon, it was very nice. I used Flourish Root Tabs for fertilizer which I replaced every 4 to 6 months. They just go in the substrate under where the plants are rooted. My first tank just had regular aquarium gravel, but later I switched that substrate to play sand and I liked it better. Now that I have a little more money, I have started using substrates specifically made for planted tanks, like eco complete. I bought ADA Amazonia II this time, but it's pricey.....then again, its for my high tech dream tank tho.....