First, you need to find a good reason to learn the language, something you had in mind when you started studying. Whether it be to pass an exam, to socialize with French speakers or any other purpose. That will help you to stay motivated. Then switch to the immersion mode, plunge into the French language completely. I remember having to choose an English name during my English classes at school; my teacher had probably understood the importance of the immersion process… You need to create a French framework in your daily life. Switch all your electronic devices into French; that’s a small yet very important step… Then focus on the INPUT: read and listen as much as possible. Watching TV or YouTube videos has to be done in French (you’ll probably have to activate the subtitles in your language in the beginning…), listen to the forecast or any podcast in French.
You should force yourself to read the ingredients of your prepared meals in French and not in your native language. If you have the possibility to go in a French speaking country, do so… if not the case, try to bring the French speaking country to yourself by creating opportunities. Like joining Facebook groups dedicated to French learning (or other social medias groups), chatting and talking to French natives online or if you already have a decent level, try to find a job where you will be able to speak French. Also, to build up a wider amount of vocabulary, you could label your furniture, appliances and other items around your house. Finally, I would advise to start thinking and make your inner conversations in French.
