When you get close to your opponent, you can attack him and he can do the same. So what if you move forward and your opponent attacks you?

Here your footwork and how you get in, that's important. For example, if you are little to the side when you get in, your opponent cannot do much. You are in a good position to strike. You can get in fast to attack and get out of that range pretty fast if you are good at footwork.

To make your opponent fall on the ground, you can sweep his leg or you can use hand to push and your body position to make this work for you.

Let's see what I said in this post and try to understand it in context.

When you move forward, close the gap, and grab him tight, it would be difficult for him to do anything to get rid of it. Now you are in control. You can attack him more or throw him on the ground.

Please watch this video that I shared - from 2:15 to 2:58 minutes.

When you get in to grab your opponent like this. you should close the gap. See how close he is when he grabs his neck. If there is a gap, your opponent can strike you and decorate your face. That's bad news. Here your speed matters, meaning, how fast you can execute that. As soon as you grab his neck like this, you can throw me on the ground as well.

Hope this answers your question. Thank you.