Help with: Identifying good sensor kits or whether I should start working with an Arduino.

Just got a Raspberry Pi (1 B?) for free (ethernet, two usb ports). Until I'm able to get my hands on a Pi 4 (which I'd like to use for Klipper with my printer), and while I learn more, I figured I'd use it to learn more about the capabilities of the pi (relative to the hardware side of things). I owned an Arduino very briefly in the past, took electronics classes in high school (but, realistically, have forgotten most of it) and am a data engineer by trade (so, very comfortable with Python).

Two questions:

• Thoughts on sensor sets that I should/shouldn't buy? Was looking at the following. There are cheaper options though - not sure how "quality" is defined for these parts.

  • https://www.amazon.com/dp/B09BMVT4CB?pd_rd_i=B09BMVT4CB&pf_rd_p=b000e0a0-9e93-480f-bf78-a83c8136dfcb&pf_rd_r=7D0F62TPWATHX1NW2QGP&pd_rd_wg=Pexly&pd_rd_w=2yAkb&pd_rd_r=4164a45c-a1ef-4f99-adf2-03a52b4aba1b
  • https://www.amazon.com/KEYESTUDIO-Sensor-Arduino-Raspberry-Micro/dp/B016KIXSMM/ref=sr_1_2?crid=1K67010AJ3J83&keywords=raspberry+pi+modules+kit&qid=1673108009&s=electronics&sprefix=raspberry+pi+modules+kit%2Celectronics%2C67&sr=1-2

• Should I consider pairing this with an Arduino?

  • My initial thoughts were to avoid overcomplicating things. From a bit of research it seems there are sensors sets that are compatible with the pi and others that are only compatible with the Arduino and that there are several methods of connecting these sensors (GPIO, SPI, ADC, etc.) to the Pi (see https://chipwired.com/connect-arduino-sensors-raspberry-pi/) Any guidance appreciated. Feel free to ask clarifying questions.

Note: At the moment, I'm just in "learning mode". I don't have any thoughts on specific projects I'd like to use the Pi (or an Arduino) for.

I have a lot of programing experience so would I love to do harder projects, but want to teach my 11 year old sister and do some small easy projects.

I want to buy a component kit to make projects for Pi 3B+ For Under $100? Preferably within/under $50?

Saw this bundle which looks promising, but says that it is for the 4th. Im guessing you can still use it for the 3B+: https://www.amazon.com/SunFounder-Raspberry-Ultimate-Detailed-Tutorials/dp/B09BMVT4CB/ref=sr_1_6?crid=2DU0P94SNT9J2&keywords=Canakit+bundles&qid=1655863348&sprefix=canakit+bundles%2Caps%2C427&sr=8-6

Any recommendations?

Will I have problems running the camera, LCD, or speakers with 1GB of RAM? What about using all of them at the same time?