I don't have any experience with this regulator but it's popular enough that I'm sure someone will chime in with better answers for you.
This regulator seems to be an ok solution for paintball setups but with a 29g tank, a paintball setup might not be the best choice financially in the long run depending on your plant selection especially since the paintball world may be switching to HPA (high pressure air) in the future instead of continuing to use Co2.
This early in the game, I would research plants and their requirements more before deciding on a Co2 system. You may find that you could skip the Co2 all together, using that money on more plants where Co2 just isn't necessary.
Many plants will do well with only seachem excel as a carbon source and you probably don't need an intense amount of light, like most of us believe when we first start out and we are being provided with excellent examples of tanks running ~50par and under that prove this, look at most if not all Takashi Amano tanks.
Also, don't forget about fertlizers. If you run Co2 with adequate lighting, your plants will need nutrients regardless of light intensity.
A low light, high tech tank (co2 injected) still needs fertilizer but your light intensity dictates nutrient intake/growth rates and Co2 helps determine the nutrient demand. More light= more co2= more nutrients to keep it all balanced. Same goes for the other way around: less light= less co2= less nutrients. But we still need all 3 for what we want our plants to do, it's just up to us to determine how much of each is needed in our individual aquariums.
Light intensity = growth rate
Co2 level = appetite
Fertlizer = meal portion size
My apologies if my post was long winded and irrelevant towards your question but I believe you should first put together a plant list and their lighting requirements and go from their.
Good luck!! It's a really fun hobby and super addicting, stick with it and you will be rewarding
