This really depends on how much you want to sink into the hobby.
As a minimum you need an aquarium and filter. If you want to keep tropical fish, you will also need a heater. If you want to keep live plants you will also need an aquarium light. This may or may not be included in your starter kit.
A list of other things you should get, off the top of my head in no particular order. Aquascape materials like substrate (gravel or sand), aquarium decorations, a good test kit that tests for pH, ammonia, nitrite and nitrate, and syphon to help you do your water changes, dedicated buckets so you don't get them mixed up with buckets that may get contaminated with things you don't want to risk getting into your aquarium, water conditioner, an aquarium thermometer, fish food, a fish net. There are other things that would prove beneficial, like the airstone, but these are the minimum requirements.
As for your test strips, personally put them in a drawer and get a proper test kit. Strips are notoriously unreliable, you have to buy a separate strip for ammonia (which is the most important test in a new aquarium), and you get a limited number of tests in a packet. A good liquid test kit like API Freshwater Master Test Kit covers all the tests you need, is more reliable than strips, and you get 100s of tests from it, so its better value for money.
I presume the waste control bio cleaner is the Fluval product? That's something else that can be put in the drawer. It isn't going to do anything useful.
A 5g aquarium is on the small size, and isn't suitable for keeping multiple fish. At a push 3 guppies, but its really best suited for a single betta. For what you are describing as wanting to keep i would look at 10g aquarium minimum, at least 20" long. A 20g would be better. Contrary to what you might think, bigger is easier. Especially for inexperienced hobbyists. Small water volumes are more difficult to manage than larger volumes.
The number one thing to research is the nitrogen cycle and how to cycle an aquarium. The nitrogen cycle are the natural processes that happen in aquariums that turn toxic fish waste (ammonia) into less harmful waste (nitrate). Cycling the tank is the process you go through to establish the nitrogen cycle and make your aquarium safe for fish. It's more than just setting everything up, getting a fish and letting things run. Cycling an aquarium properly takes weeks/ months.
Here is a link to some useful articles for new hobbyists.
Here are a few good resources to help you get started. Tips and Tricks For Your Fastest Fishless Cycle! – Aquarium Advice https://www.aquariumadvice.com/articles/the-almost-complete-guide-and-faq-to-fishless-cycling/...
www.aquariumadvice.com