Noob here and I need some help. I was wondering if you could provide me with some assistance. I'm looking to program an arduino to measure temperature and humidity and the trigger a misting system as well as a heat pad to then regulate it. I also would like to make a timer to turn lights on and off at specific times of the day.
Is this possible? Also is there a submersible sensor that I can have in a bucket of water and it would alarm me if the water ran low?
Thank you in advance
That's all feasible with the Arduino but it's a lot of "stuff" for (apparently) your first project.
Take it one SMALL step at a time... Start by learning to read a temperature or humidity sensor, etc.
If your heating pad is AC, you can control it with a relay. A regular electro-mechanical relay usually needs a driver circuit, but you can get relay boards with the driver and relay. Or, you can find solid state relays that can be directly controlled by the Arduino. (A relay is an electrically isolated, electrically-controlled switch.)
A DC heater doesn't require isolation, but you can't directly power it from the Arduino, so you'll need a relay, transistor, or MOSFET, etc.
The same goes for the lights.
You "regulate" heat by turning-on the heat when you're below your target temperature and turning it off when you are above the target. ...Just like any thermostat, air conditioner, or refrigerator.
...at specific times of the day.
You'll need a Real Time Clock Module. These keep better time than the Arduino by itself, and they have their own back-up battery so the time doesn't get messed-up when you loose power.
Depending on what kind of user interface you want, you may also need an LCD display. i.e. Without an LCD display, you'd have to set the time-of-day and program your events with the computer.
Also is there a submersible sensor that I can have in a bucket of water and it would alarm me if the water ran low?
Look for a float switch or a liquid level sensor.
Totally agree with @DVDdoug and is advice I often dispense myself (even when not asked)!
Sounds like you need a series of carefully crafted YouTube videos that demonstrate several of the items you mention to get you on your way.
If only I could think of a source of such a library of information -- oh, wait, just check out the URL in the footer of this post and you could move your project forward with great speed! Seriously, think about subscribing too, new videos every week(-ish) all aimed at noobs to move your project on its way.