The substrate: Samurai Soil. I don't think many people have experience with this, and there's not a whole lot of information about it online. Purchased by recommendation of lfs.
The light: Coralife T5 H.O. Dual. This was the "best" light that they carried at the lfs. I think that I've been told it is better for saltwater. I plan to replace the bulbs with better ones eventually.
In my opinion, you need to decide what you want out of the tank. Fast growing stems and crypts/anubias have different needs.
As to light, you need to consider the dimensions of your tank. If you have a typical 30G rectangular tank, they are only 16" deep. ANY T5HO in a 16" tank is high light. You would need good CO2 and ferts or it could get away from you in a hurry.
If the tank was just crypts/anubias/ferns, I would try removing the reflectors, raising the light, or even going with T5NO or LED.
E.I. dosing: I have the GLA E.I. kit. KNO3, KH2PO4, K2SO4 and "Plantex" which is their equivalent of micros. I dose macros M,W,F and micros T,TH,SAT. 25% water change 2x week instead of 50% on Sunday. Logistically, it's far easier to do 25% 2x weekly for me. Sometimes I skip the KNO3 if nitrates are already elevated.
Your lighting will drive the demand for ferts. If you stick with T5HO, you could dose full EI, but I would strongly recommend good CO2.
CO2: currently DIY with baking soda and citric acid. Obviously, plan to upgrade to pressurized. I've been eyeballing one from GLA, just need the cash to cough up. Since it's DIY it can be pretty inconsistent.
If you can't get pressurized now, personally I would keep injecting what you can. Some is going to be better than none. I've seen some pretty nice tanks with DIY CO2, but you need to keep up on it. Of course, it's all related to light. If you decrease the amount of lighting, you will have less demand for CO2.
Yesterday I added two bunches of stem plants, rotala and ludwigia. I'm hoping that adding some fast growing plants will help.
Most Rotala and Ludwigia will do much, much better with at least some CO2. Without it, they can survive but in general do not thrive.
And remember, your tank is young. It takes patience and time to get the right balance of light/CO2/ferts. Every tank is a bit different. It also takes time to learn which plants like what you are serving. There is a good deal of trial and error involved.
I've been high tech planted for over two years and am still learning/experimenting and fine tuning things. Good luck with everything and I look forward to seeing where this goes.