I understand you don't know the strain of your seeds but do you know if your seeds are indica or sativa leaning? This is important if you are planning to grow outdoors for a portion of the time. What is your climate like? If its a cooler climate, I hope you have indicas. If its a warmer and more humid climate, sativas what you need.
If you try to grow a plant that is not suited to the environment you have, you most likely will not succeed and your plant will sadly die.
You should also make sure to have necessary N-P-K ratios in your soil mixture. Seedlings don't really need any added nutrients for the first 2-3 weeks of life but after that, your plants will be looking in the soil for what they need and they need a lot of N in the beginning, during the vegetative growth phase. Later on in flowering, they will need more P and K. This is just in general, there are also many other micronutirents that your plants will need as well