First, a safety comment. I hope you are wearing a really thick glove when you're doing this. I also hope you have the plane firmly immobilized so it won't jump forward when it starts. Props are sharp and hard. As many can attest, you can get a good rap on the knuckles, or worse, a really bad cut, when the engine kicks back while starting. It's safer for a beginner to hand start with a chicken stick instead of their hand. Many would tell you to stop doing anything by hand and just use an electric starter. I'm not one of those, but I'll say be careful, and you should find someone locally who can help show you the safe way to start an engine. There's 101 little safety things that experienced people do without even thinking about them. You'll either learn them by experience (ouch, better not do that again!) or from someone with experience (less painful, and much less dangerous). Let someone with some ouches save you from having to lean by personal experience.

Ok, now that that's out of the way, as has been said, you are getting a bump. A bump is a little kick back on the prop when you bring it through compression. It's often used as a signal that the engine is primed well enough to start it. Briefly, here's a typical starting sequence (hope I don't leave anything out):

Begin with the glow driver OFF the engine, and throttle opened to full.

Put a finger over the carb, or end of muffler if cowling or engine orientation prevents access to carb.

Being sure to keep arm away from prop arc, flip engine through compression several times. The goal is to use suction (if finger is over carb) or pressure (finger over muffler output) to get some fuel into the carb.

Remove finger from carb or muffler, move throttle to idle, and attach glow driver. A brief note about glow drivers. I use this term to mean the all in one unit with connector and rechargable battery, a wire connected to a 1.5v battery, or a wire connected to the glow driver output of a power panel. The power panel is my favorite because it gives you an adjustable output so you can get a nice strong glow.

At this point, some people will FIRMLY hold the prop and bring it through compression. Did I mention, keep your arm away from the prop? This does two things. If the engine is mounted inverted, it confirms that the engine has not become flooded. It also lets them feel for "the bump". If you get a bump, the engine is telling you it's ready to start. If you don't get the bump, some people will remove the glow driver and prime a little more.

If you got the bump, or don't want to check for one, the next step is to flip the engine through compression several times, until it starts. If it doesn't start, or show any signs of firing, remove the glow driver and prime again.

A few more safety things to remember.

Some engines, when already warm, have started even without the glow driver. You should assume that any time you move the prop, the engine could start. This means keep all body parts away from the prop and make sure it's not going to be able to move when it starts.

I've found that the metal to metal connection between glow driver and glow plug can create little blips on the radio, which can open the throttle a bit. Once the engine is started, and until you get the glow driver removed, assume these little blips can happen and stay clear.

Once the engine is running, do the rest of your work, removing the glow driver, adjusting the needle valve, measuring the RPMs with a tach, etc from BEHIND THE ENGINE. Do not allow any part of your body, or anyone else's, to be in the prop arc. If something causes the prop to fail, you do not want a body part to be in the way of the flying blade.

Hopefully I got all the major points. It's still best if you work with an experienced person who can watch you and help save you from some ouches.