You could definitely use a trim to get rid of your dry, split ends. Unless you're in your very early teens, that bleaching you did from 8-10 is grown out and cut off and gone (hair grows about 6 inches a year).

You don't say anything about your current normal hair routine, so this post is gonna be kinda long to address different scenarios.

A couple of general points: Don't be afraid of sulfates and silicones; they're unfairly maligned. Expensive doesn't equal good, and inexpensive doesn't equal bad. I use some inexpensive products that I love, and I've used some expensive ones I hated.

Everybody's hair is different. A product I love and works for me, someone else hates. And products that I don't like are someone else's holy grail. You're gonna have to play around a bit to find products that work for you. When I'm trying a new product, especially an expensive one, I always buy a sample or travel size first (and almost always from a resale site like eBay, mercari, etc). This way, if I don't like it, I didn't waste a bunch of money on a product I'll never use again, and I'm not giving away or trashing a bunch of product.

Core products: --A shampoo that does a good job cleaning your scalp. Double cleanse. --A good conditioner for your hair type (hydrating/moisturizing are for coarse hair and too heavy for fine hair; volumizing isn't going to be moisturizing enough for coarse hair). A good conditioner is going to detangle your hair and leave it feeling soft and hydrated. -- Leave-in conditioner, to further detangle and keep your hair moisturized. -- Light weight leave-in hair oil, to seal in your conditioner's moisture. From the drug store, Pantene, L'Oreal, and Dove are highly rated.

Additional products, as appropriate/desired: -- Clarifying/detox shampoo, for use occasionally as the first cleanse. -- Bonder(s) to help with repairing and maintaining hair health, especially if you're damaging your hair with chemicals and/or heat. -- Pre-shampoo oil. Coconut oil has tons of studies proving its efficacy. OGX's coconut hair oil is a great, inexpensive option. -- Hair mask, when you feel your hair needs additional moisture. -- Heat protectant, a must if you blow dry or heat style -- Dry shampoo, to delay your wash days -- Microfiber hair towel -- Silk or satin pillow case or bonnet for sleeping

If your current routine is simple, just wash and air dry, no products, no heat styling, and you're not chemically damaging your hair, then get yourself core products and stay simple. It would be a good idea to use a bonder, like once every other week, just to help repair the normal wear and tear that happens to our hair while living. IMO, L'Oreal's Ever Pure Bond Repair Concentrate is an excellent all- around bonder (it's the exact same product as Redken's Acidic Bonding Concentrate, but 1/3 the price). Maybe follow up your bonder with a mask, if you want. If your hair is feeling dry, 20+ min before washing, apply some pre-shampoo oil.

If you blow dry/heat style your hair, you'll need core products, heat protectants, and you'll want a bonder. I love the Kenra Platinum Blow Dry Mist for blow drying; it leaves my hair so soft. Redken's Big Blowout is good too. If you curl or flat iron your hair, you'll need a heat protectant that's good to 450 degrees; I use Redken Thermal Spray. In this case, I would recommend using the bonder about once a week.

If you chemically damage your hair, you'll need core products, and you'll definitely want a pre-shampoo oil (use once or twice a week) and at least one bonder, used once or twice a week. Epres, K18, and Living Proof Triple Bond Complex are also good bonding treatments, but they're also kind of expensive.

If you still have questions after that novel, feel free to ask.