You should definitely becareful with a lot of corals in a small tank. Tanks of our size tend to "crash" after about a year due to several variables but most notbly nutrient build up. Tiny tanks as also more sensitive to swings in parameters.
I am able to test and really stay on top of my maintence. I do 25% water changes weekly, replace the filter floss and clean the sand bed.
Before you spend $$$ on lots of nice corals ask yourself "How much time can I spend every week to maintain!?" If you can't do a similar or better routine than I am.... I would stay with very simple corals like Zoas, softies and some LPS.
Thats a Frog Spawn in that pic. It looks a bit like an aneomne in that pick though.
At a very quick glance... That Marineland light is going to limit the stuff you can keep and grow. I think you might be able to do a small fish and some soft corals with maybe a couple Zoas. I def would not do any LPS or SPS with that light.
I am currently using the Coral Compulsion Par30 18k bulb. I think it sells for about $60. Its a good upgrade that allows you to do much more.