If it were me, I would buy tools one by one as I need them. A Black-and-Decker or Ryobi corded drill/driver and a decent Japanese-style pull saw would be a good start. Be aware that you will need practice to use either one well.
You also need a combination square and some way to mark your cuts. I like those cheap snap-off knives at Home Depot for about a dollar each. You also need a tape measure, but preferably some story sticks, though you need to learn to use them. You may also need a bevel gauge for angled cuts.
If you are doing furniture, a random-orbit sander is a must-have. I like Bosch for their superior dust collection.
If you need to work at more than one worksite, then you might need cordless tools. Ryobi is a relative bargain, but I like the Milwaukee M12 tools. Ryobi has the advantage of offering a wide assortment of lawn- and garden-associated tools. Dewalt also makes premium tools, some best in class. But their lineup isn’t as broad as Ryobi (on the cheap end) or Milwaukee (on the premium end.) And they are pricey.
You don’t need brushless tools (yet.)
I would also invest a fair amount in developing your skills. Books, magazines, online forums, etc., can make your work better and faster.
Also, go to your local Home Depot or Lowe’s, and check out the tools they have for rent, and for what cost. If you don’t need particular tools every day, it might make more sense to rent them as needed.
Don’t forget safety equipment. Gloves and glasses are a minimum. If you are sanding, then you need dust masks.
And don’t forget your work place. You will need adequate space, adequate light, possibly ventilation and heat, etc. You will need some way to secure your workpiece, probably soem clamps.
Tools are both less and more important than people make them out to be. Be aware that if you underpurchase, it isn’t hard to sell your tools and get something more powerful. And you don’t need the absolute best drill/driver to install your Christmas lights. On the other hand, if you use your tools every day, then things like grip, smoothness, noise, visibility, etc. can make a big difference.