1st grow/ Off Season, Advice

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So this is my first attempt at growing and from what ive researched I chose a bad time of year to even give it a shot which is okay cause it was bag seed and I really haven't invested much into this anyway. I'm using the following:

• Miracle grow organic potting soil
• About 30% Perlite
• espoma plant tone 5-3-3

I also have only been watering with distilled water as a lot of people say is the best choice.

Anyways, she's about a month old now and the light cycle where I live is a solid 12/12 now so I'm expecting to see some signs of development in the next two weeks or so and just today when I went outside to do a daily check for pests or anything like that I noticed that the tips of my first set of "spiked" leaves had almost like a small white/yellow trail that seemed to be going further down the leaves. (You can kindve see in the first photo I posted,am going to post more) I've seen what magnesium/phosphorus/magnesium deficiencies look like and it didn't really resemble any of those to me. What do you guys think? Any advice at all on offseason outdoor growing would be helpful also! Thanks!

Come on guys! No advice at all?

my advice is grow during summer...
you are on your way to harvest a gram...enjoy....
you might be able to pull off something this time of year if you veg inside...

Yeah I know I'm not setting myself up for any relatively big yield but I was just curious if there were any tips from people who have grown this late in season maybe for experimental reasons? Also haven't really found out exactly what's going on with the tips of the second fan leaves. If anyone knows what's causing that, It would be really helpful. Recently temps at night have dropped so could that be it?