OK first off... Cu-dos to you for coming here first!! Before you buy!! and WELCOME!!
There are lots of things to consider. Budget, space, the Fish you are interested in and IT's tank requirements (which are effected by different things in your water like PH, GH, KH) but that's another thread.
Think LONG not TALL. Fish need SPACE to swim. Try to get the biggest you can afford and have room for. That is not always the "Kit". Sometimes piecing it together works better, sometimes not. The "footprint" is something to consider too. Do you need a stand and can you upgrade the tank to a bigger size using the same stand (some day).
A 30 can become a 40 tall same footprint and stand, and a 75 can become a 90 that sort of thing. Tanks come in standard L x W.... and then the H give you the extra gallons. Why would you upgrade? It's just an option should the old tank need to be replaced some day or the big tanks go on sale. Ya never know where this new addiction will take you. Just sayin'
Lots of fish need MIN 36" tanks... some need 48" tanks... and some cannot go into anything less than 72". Do you have a sense of what you want to keep?
Do you know your PH? Acidic and soft water or Basic and very hard water? (Hard water leaves a white film or spots on everything it lands on.)
I love a cannister and only use them but not sure if one would be too big for your tank. Always get one of those that might do the next sized tank too ( again in case you upgrade)
I hope this helps... I try to think in terms of getting the most for my money, I don't have enough to throw away ya know? So I plan ahead. This may seem off topic, but it's not... the size of the tank will help you decide if that kit is OK or not... and then that determines if a HOB, hang on back, or canister is better suited.
It's like a kitchen reno... you change the taps and the sink looks ugly so you change the sink and the counter looks ugly... change the counter and the walls need painting, so you paint the walls and floor looks ugly.... next thing you know she's asking you to take down a wall.