@solarslurpie what are your temps? What cultivar/strain are you growing? Is it an auto or photo? Along with the brown spots I can see that your leaves are starting to yellow from the outside in as well.
Usually when you see a combination of nitrogen deficiency along with calcium and magnesium deficiencies it’s either a vpd issue, over watering, potassium lockout, or under feeding. I don’t really see any of the burning yet that comes with vpd issues or lockout unless this is just early stage. So it’s likely either over watering or under feeding.
I would look into the other issues first before just feeding more and possibly making the issue worse. First check soil pH to make sure it isn’t potassium lockout. If it’s potassium lockout your soil pH at the root zone will be high. Usually over 7.
If your pH is good test for vpd issues. If your temps are 75f or more try splitting up your feed into two separate feedings. So if you feed once a week split your weekly feeding in half and feed it a half dose twice a week. This will solve the issue if it is vpd related.
To make sure it isn’t over watering water less frequently. You can saturate the entire pot if you want during a watering but wait to water again until the pot is almost completely dry. Cycling wet to dry is the best way to water.
If changing the feed schedule and cycling wet to dry doesn’t work you will need to increase your feed. Up your grow nutes and if your grow nutes don’t have calcium, magnesium, or other micros add some calmag and micro boosters.
Hope this helps man. Happy growing.