u/Wide_Selection4786

Hey everyone,
I’m 16.5 years old and I’ve been skinny for pretty much my whole life. I recently decided that I want to make a serious change, so I joined the gym about 2–3 weeks ago.
I’m currently around **45 kg (99 lbs) at 174 cm (5’8.5”)**, which I know is quite light. About 5 months ago I was around 41 kg, so I’ve already gained roughly 4 kg, and I want to keep making progress in a healthy way.
I’ve already seen a doctor and was given some medication, so I’m also trying to take this seriously from a health perspective.
I have some basic knowledge about calories, protein, sleep, progressive overload, etc., so I’m mainly looking for advice **beyond the usual “eat more protein and calories” advice.**
What are some things you wish you knew when you were starting out skinny and trying to build muscle/weight?
A few things I’m particularly wondering about:
What mistakes should I avoid as a beginner?
How should I approach training while I’m still quite light?
Are there any habits that made a big difference for you?
How long did it take before you started noticing a real difference?
Is there anything I should prioritize besides calories and protein?
I usually get around **8–8.5 hours of sleep**. Is there anything else I should focus on for recovery?
I’m also wondering about height. I was around **172 cm about 4 months ago and I’m now around 174 cm**. At 16.5, is it realistic that I could still grow taller?
Can being very skinny or not eating enough affect growth during the teenage years?
I’m basically trying to make a big positive change in my life, so I’d really appreciate advice from people who have been through something similar.
Thanks!

Hey guys, I’m flying Qatar Airways from JED to DOH to ISB and I have about a 1 hour layover in Doha.
I want to take my PS5 Slim in my carry on. The PS5 is around 3.2kg and my carry on itself with some clothes/padding is around 4.1kg, so that’s about 7.3kg total.
I’ll also have a backpack with my laptop, laptop charger, 2 PS5 controllers (around 0.7kg together), 2 game discs and some other chargers/accessories. The backpack is probably around 1-2kg.
If I put the controllers in my carry on, it would be around 7.9-8kg, so I’m wondering if I should just keep them in the backpack.
How strict are Qatar with the 7kg cabin bag limit? Do they allow a little bit over, like 7.2kg or 7.5kg, or does it depend on the person/check-in counter?
Also, how much can I have in the backpack? Do they weigh the backpack separately or count it with the carry on?
And do they usually check the cabin bag weight again at the gate or in Doha during the connection?
Also if anyone has taken a PS5/PS5 Slim on Qatar Airways as carry on, did you have any problems with it at check-in or security?
Just wanna know what to expect before I get to the airport lol. Thanks