Epsilon F1 by RQS - LST - First grow

Moving on to week 3, I switched the light to a Mars Hydro TS 600, and the plant seems happy under it. However, it's tough to LST sometimes because it stays very compact, and the branches don't want to grow out much. Instead, it's more focused on developing good side branching. I feel like I made a rookie mistake of overwatering during the first few weeks, which might have stunted growth. I fed it with 4 ml of alga grow and 1 ml of root booster per 1L. Advice is always welcome :)