I make my own ferts using the Green Fert package from Green Leaf Aquariums. It comes with a micro mix that you put a measured amount into one bottle of RO
or distilled water, and it comes with a few other separate dry ferts that you mix into a different bottle. They also carry the bottles and root tabs. You'll need a cheap digital gram scale that everybody usually gets on Amazon for around $8. This is called the PPS-Pro method and I and many others use it.
That said, unless you want a lot of plants it may be easier to start off by ordering premade ferts and root tabs. Seachem comprehensive, Excell and root tabs as well as API Leaf Zone are great to use as far as branded products go. You can also make your own version of Excell with Glute solution that Amazon also carries. I'm on my iPod so I don't have a link ATM.