I don't see any issues with your English, but I do see your issues related to self-confidence and attitude towards life which doesn't sound so positive. First, you should stop thinking that only a high IELTS score can secure you a good job. Second, don't get caught up in deceitful online remarks saying people with a band score of 8 are as common as dirt and stressing yourself out about it.
It's good to look ahead, observe what's happening around you, and understand the current developments. Having a plan for that is great. But, sometimes you don't have to look that far ahead or outside, especially when overly hyped successful stories make you feel belittled and insecure. Look within you, focus on yourself. Handle that first. When you feel good about yourself, the outside world won't have as much of an impact on you.
What you can do immediately is put your energy into your present concerns: How to improve your speaking skills and get a higher IELTS score. I'm sure they're enough to keep you busy. Practice everyday. Set a timeframe, maybe every two, three months, or six months. After that, see what progress you've made and what more you need to do.
Remember, be specific about your purpose of improving your speaking skills because giving presentations is different from daily conversations. When you're just chatting, you're usually talking about stuff that is familiar to you. But when you're presenting, it's more complex. You got to organize ideas, develop them and back them with proof. So, yeah, it does need some preparation. This holds true to your native language as well. Even in your own language, presenting without preparation can lead to a messy, unclear speech. So, whether you need to prepare or not and how much time you need to prepare depends on various speaking situations.
One more thing, if you're really looking to boost your speaking skill in daily conversations, watch movies. If you're into American English, go for American movies. I personally enjoy Lifetime movies.
Watching movies is a great way to pick up phrasal verbs, idioms, and how language is used in daily life. It also gives you insight into their culture and daily routines. Plus, in movies, they talk pretty fast, kind of like how they do in real life. People speak, whisper, argue, and yell in different tones, volumes, and accents amid background noises, reflecting the true nature of everyday conversations. It's not like when you watch educational or informational videos where enunciation is very clear. By the way, when watching movies, pay attention to how Americans move their mouths when they speak. This can significantly help you understand how to shape your mouth correctly to speak more naturally.
