4X4 Tent (First Time Grow)

First time grower here! any and all advice is welcomed. 4X4 Tent Vivosun VS4000 LED Coco/Perlite (80/20) Athena Blended line RO water RH around 55% Temp 73F-77F 3x Grandi Guava 3x Apple Fritter Seedlings...