If you can begin to invest in bitcoin now, before 2024, it would be good. If you want to wait until the beginning of 2024 to start investing in bitcoin, it is not still too late.
Next year will be full of the bulls. Bitcoin will get to all-time-high. Bitcoin may reach six digits.
Starting to invest in the new year isn't that bad of an idea, January is a bad month for cryptocurrency market as a whole so OP might be onto something here. Now we don't know when will that all-time-high will happen and I don't think it's even going to happen real soon because the halving hasn't happened yet and we haven't seen any significant sign that the peak is going to happen, so it's still a good time to buy at the early months of the New Year but you're right too, just start investing now but we can't blame OP because he/she might have no money yet so they can't do it yet.
If you want to start investing next year OP, you better start learning the some stuff about crypto and find the exchange and wallet that fits you. I recommend learning about Metamask, Binance, KuCoin, TrustWallet and BlueWallet. One thing about exchanges though is that if you choose to store your bitcoins there, you have to remember that it's not your bitcoin anymore because they're custodial wallets, basically you trust the exchange to store your bitcoins and crypto in their exchange.