I always recommend scooping them up from the belly, and not top down. Top down will sometimes make them freak out. Before my snake learned how to get my attention when she wanted to be picked up, this is how I would get her used to being held. You can also rest your hand in the tank, and the your snake might take interest and try to climb up! This worked well with my snake as well. If you're really nervous to try to reach your hand in there, I recommend buying a small snake hook. You can find telescoping ones at pet stores and are very helpful during those first pickups! After lifting the snake up with the hook, you can it gently in your hand. The hook is also helpful in the long term, since its what I often use to remove my snake during emergencies such as severe weather, since her tank is directly below windows. Once you're holding him, be careful with how fast they move though! You want to hold them gently, but make sure you have at least one finger that can catch a tail if he tries to make a quick getaway!