Learning Chinese isn't easy, and I recommend doing it with the guidance of an experienced teacher. A teacher will make sure you stay on the right path and learn the right things first. Here are some other suggestions I think will help you:
Make a plan:
First, you’ll want to make a plan for how you’ll go about learning and memorizing. I recommend going from the most commonly used characters and terms to the least used. A number of different resources are available online that organize the characters this way already. There are also textbooks, like “Learning Chinese Characters” that do the same.
It’s okay to adjust the plan as you move on, but don’t keep changing things up. Find something that works as quickly as possible and stick to it.
Writing by hand:
This one is controversial.
I bet you’ve seen the pictures and videos of students writing the same characters over and over again. For some learners, this is the way to go, even if it seems like a daunting (and boring) method. All learners should use it to some extent, though. It commits characters to your muscle memory so that recalling and writing them becomes reflexive. This can only get anyone so far though. For native-speakers, writing is a part of their daily routine. They do it all of the time, which further reinforces the characters in the memory. For others, this isn’t the case. The muscle-memory approach won’t work beyond the first few hundred characters. That’s where another memorization method comes into play.
Learn the radicals:
Chinese characters are broken down into 214 smaller parts called “radicals.” You should get to know these components and their individual meanings. Most Chinese characters aren’t new and consist of multiple radicals.
Knowing the radicals helps because they’ll help you construct a mnemonic device for keeping a word stored in your memory. For example, what some of my students like to do is create stories about characters. If you know the radicals in a character, you can link them together into a story. This method is especially useful for those characters you just can’t seem to memorize any other way.
Flashcards:
A tried-and-true method. You can make them by hand, but I recommend a program called Anki. Anki allows you to create digital cards that learn as you do. This means that the more familiar you are with a card, the less often you’ll see that card in the deck. Anki is highly customizable and, combined with other methods, can be extremely useful. Don’t spend all day flipping through flashcards though. That brings me to my final point.
Use it or lose it:
The most powerful learning method is to actually get out there and put what you’ve learned to use. Try to slip what you’ve learned into your conversations with Chinese people, and pay attention as you wander around. Listen to what other people are saying and read the signs around you.
Of course, this method only works if you’re living in China. If you’re not, your best bet is to communicate with a native speaker. You should already be working with a teacher, but if you’re not, I strongly encourage it. It will allow you to simulate being in China to some extent, as you’ll have someone you can talk to. Better yet, they’ll be able to give you feedback. Do a quick search for eChineseLearning, my language school, for additional resources that'll help you learn the language. You can even get a free Chinese lesson. You can add me on WeChat: AC_eChineseLearning.
Those are my suggestions! Good luck!