Assimil is a great way to throw yourself into the language. Each lesson is in the form of a conversation with audio and the pdf has the text along with the translation.

Listen to the lesson without reading the text first. This gets you used to the sound of the language. Then read the text, then text with audio, and finally read the translation along with whatever notes on grammar (don’t focus too much on the grammar aspects when you are first starting out), neither on spellings. Later on you’ll be asked to go back to earlier lessons and reproduce the text. The first phase is to internalise the language. You can read the recommended Assimil way of learning and adapt the steps to something that suits you.

Assimil works well along with Language Transfer for me. Assimil is more immersive while Language Transfer is more explanatory.

I find that music is also a great way for me to learn new words. Once I listen enough times to a song I like, I start humming along, maybe repeat a word or two. The important thing is to not stress yourself out trying to sing along to everything. Maybe there is a catchy chorus or bridge section that is memorable. That is good enough to form associations with words. In this, I find pop songs are a better genre because they are catchy.

Something else I do is have a notebook where the only rule I have for myself is: no using my native language. I try to explain new words to myself using a sketch or whatever basic words I have already learnt. Don’t worry if you can’t draw well, neither can I. But I can draw something that looks like a spoon or a hill. Then I label them, and bam I’ve already learnt two new words. To build on that, I can draw a stick figure on the hill - this has taught me the verb climbing. You get the general idea. Just don’t stress yourself out trying to journal every new word you come across. Be creative and you’ll have fun.