Aside from my native language I speak three foreign languages, and I just started learning the fourth one. Besides that, I wasted a lot of time on another language that did not stick, so I kinda know what works and what doesn't.
1. Consistency. Make sure you practice a little every day. For example, I use an app that tells me every day what vocabulary I should practice that day. It takes ten minutes of my day, and does wonders.
2. Communication. Start talking to someone as soon as possible. If you're learning a Germanic or Romance language, after 6 months you should be able to find someone online to chat with. Of course it's going to take you 15 minutes with a dictionary to understand the other person's message and another 15 minutes to write the reply, but it truly does wonders because it allows your brain to see the language as a language.
3. Fun exercise: try vocalizing your internal monologue in foreign language. Don't focus on correctness at all, it's about familiarizing yourself with the language.
4. Find some interesting media in your target language. It's going to be difficult because most important stuff is available in English, but for example you might try movies or YouTube channels. Especially the latter is great because YouTube videos rarely ever have English translation, so you know that either you watch it in your target language or not at all. There are apps that allow you to listen to foreign radio stations. Why not doomscroll in your target language.
5. Don't give up until you reach level B2 and you can talk without consciously thinking about it.
6. Understanding native speakers talking naturally to each other is literally the hardest part, so don't treat it as a benchmark until you reach fluency.
7. A common mistake is to treat the whole thing as a "sequence to sequence" task and think about the target language in the context of your native one. Your actual goal of learning the word X is to have your brain understand the abstract concept behind it.
8. It's going to suck and you'll hate it. There's no way around it. Keep practicing and adjusting your techniques to your liking. One day something will "click" and you'll actually "feel" the language.