This is my feeding schedule (for use with my soil) using Grow More - Sea Grow as the base fertilizer.
When creating a feeding schedule, it's important to be aware of the NPK ratio. (Example, a product labeled "16-16-16" is a ratio 1-1-1. A product labeled "24-8-16" is ratio 3-1-2.). By reducing the NPK value (from a label) down to a 1-based ratio, it's easier to compare products, or understand how mixing products creates something new.
You should also be aware of the strength (PPMs) created by the total amount of fertilizer you use.
There are many franchised multi-bottle feeding programs which you can purchase. These come with a schedule telling you how much of each bottle to use. However, if you study the resulting NPK ratio and strength, you'll find that they're all very similar. In veg they produce something like ratio 2-1-2. In transition: 1-1-2. In flower, 1-2-2. They tend to be a little stronger in flower.
I have unpacked some franchised feeding programs to show what they produce. But, you can use almost any generic fertilizer product to create your own ratios and strengths. Whether you make your own, or purchase a multi-bottle boutique "lineup," you should be aware of the calculated NPK ratio & strength. This will help you "read your plant." It doesn't do you any good to merely feed "5ml of this bottle, 10ml of that bottle." If you know the ratio & strength, you'll know how your plant responds to that (which can then be useful when using other products. It will be transferable experience.).
I made a spreadsheet to calculate the resulting NPK ratio & strength when using multiple bottles.
This spreadsheet was a "game changer" for me. It helped me understand what my plant is receiving, and how to experiment with nutrients. I used it to create my feeding schedule (for use with my soil). And, I decoded some franchised multi-bottle feeding programs (which may guide you in creating your own feeding schedule).