If you want to learn about ink cartridges there are many websites out there to help you. The researching phase of any major purchase should be done with care. There are so many different types of printers and ink cartridges available with many different options.
A retail store is not always the best place to learn about ink cartridges. They are often more interested in selling you something, and less often in educating the consumer. A good website is a viable alternative. A trustworthy website should have unbiased reviews on the types of ink cartridges that are available.
You can get new ink cartridges, refill the ones that you have, or buy repurposed ink cartridges. Every type of cartridge has its good points and bad points. Refilling can be a messy and involved process, but buying new can be expensive. You should learn all the facts and weight your options before committing to a purchase.
Another factor to consider is how many cartridges your printer will require. Some require just a black and color cartridge, while others need black, yellow, cyan, and magenta. Photo printing requires another type of ink all together. The various printers and ink cartridges have many differences. If you learn about them before you make a purchase, you will be an informed consumer. Finding a cheap printer on sale may not be your best deal once you have figured in all the associated expenses. The cheapest printer might just require more expensive ink.