Need help also. I want to have a nice fully planted aquarium, so it is better to post a question than make a huge mistake

To summarize quickly: 102 gallon tank with 4x 54W fluorescent T5 tubes = 2.45W/gallon. CO2 system with spiral diffuser. I couldn't get KNO3 or K2PO4, so I went with Seachem
By achieving this levels:
pH 6.5 to 7.0
KH 3-6 degrees
GH 8 degrees
NO3 8ppm-10ppm
PO4 0.2ppm to 0.5ppm (?)
Fe 0.2ppm
K+ 20-30ppm (?)
how will I have to start dosing?
The plants will be: Glosso, Anubias nana, Microsorum pteropus Narrow and Windelow, Eleocharis accicularis, Rotala macrandra "narrow leaf", rotundifolia, nanjenshan and walichii, Vesicularia and Riccia.
Water from R.O. is pH 6.5, KH 0, NO3 0ppm, and my normal water (from a pipe) is pH 7.5, KH 10 degrees, NO3 25 ppm.
So when I will firstly fill up the tank (102 gallons) with 50% of R.O. and 50% of normal water, I will get pH 7.0, KH 5 degrees and NO3 about 12 ppm?
How should I start fertilizing with Flourish, F. Trace, F. Iron, F. Potassium, F. Equilibrium, F. Nitrogen, F. Phosphorus? I have read everything on fertilizing topics, seachems products and I am even more confused as I was before.
My wc will be 30% every week. So every week I will try to get KH around 4 with water from R.O. and from a pipe. What about other micro/macro nutritions? How to achieve the levels above with Flourish line?
Thnx for your answers.