As others have stated, make sure you aren't holding your breath. Weight yourself for the end of the dive, not the beginning. When you're at the surface and ready to descend, make sure you breathe out in a continuous stream as you go down. Once you get to depth, it'll be much easier to become neutrally buoyant by using your BCD and lungs. If you're weighted properly, you can actually achieve a state of zen where you use the air in your lungs (or lack thereof) to rise and sink in the water column.
Most of it will just come with experience and bottom time. Don't be so hard on yourself. Remain calm during this, getting worked up or nervous is also something that makes getting down difficult as well. You're not in control of your breathing. Good luck and welcome to SCUBA!
Most of it will just come with experience and bottom time. Don't be so hard on yourself. Remain calm during this, getting worked up or nervous is also something that makes getting down difficult as well. You're not in control of your breathing. Good luck and welcome to SCUBA!