As long as you can allocate your money by weekly or monthly to buy Bitcoin, you will have a chance to have Bitcoin and benefit from Bitcoin.
The OP should not forget to use the amount he can afford to lose because, even aside from allocating weekly or monthly money to invest in bitcoin, there is still a possibility that he still does not know the risk attached to bitcoin investment, so it’s better. I think he should learn about it first before he takes any further steps towards investing in bitcoin, or maybe he should start with a small amount of money and then continue learning the knowledge of how bitcoin investment works.
If @OP gets payment from his client in Bitcoin so he doesn't have to sell all of his Bitcoin and hold for some amount as his investment. That will works good for him as he can fills his daily needs by selling some amount while he saves the other amount for his investment. He can buy more Bitcoin if he wants and add more amount of Bitcoin to his investment.
Learning more about Bitcoin is a must especially if he wants to know the more benefits of Bitcoin. Besides that, he can learn how to manage the risks in investing in Bitcoin. Everything will start with learning if we want to involve in something so we understand how to use it properly.