Loading guns in your basement when you never used them before? Risky, Not to mention how its going to feel when you blow your ear drums out. Anyways....
Their is a mag release that should drop free your magazine, remember to bolt ALWAYS has to be open to put the magazine in. If your bolt wont pull back you have a problem.
Because you've seen it happen at the range I assume

Same way as you can take SVT bolt from the bolt catch by tapping the stock against your own body
On the other hand, OP, just like people said, if you are not familiar with certain firearm - youbute is your friend. If you are not familiar with computers - range is your friend. You WILL find people how have knowladge about your firearm. Well, 95% of the time you will. Guys at my local range are more than willing to spend an hour with new person just to explain to them how firearm operates and teach them about major issues they might encounter. So 2 hour drive in order to learn how your firearm functions is not a waste of time in my books.
Just to let you know, You can drop your firing pin by simply smashing you guns butstock on the ground. It doesn't even have to be hard just a simple slip on the firearm. Ask me how I know?