No No No
Go out on a cloudy day preferably overcast.
Climb up in the first layer so you cannot see anything.
People will advise against this but you are PIC not them?
Best thing to do is get on flight following and no matter what they point out to you, tell them you got it in sight. Helps to even complain about the visibility being so awesome that your brain can't process all the information you are getting from your eyes.
"cloudstomper niner victor tango you have a Mooney 2 miles out 12 o clock same altitude opposite direction"
Your response "Oh yes, I know I was actually just about to call you and give you the heads up"
Now turn. Steep turn as quick as possible and climb quickly because that plane will hit you either 90 degrees or 270. That decision is up to you you are the pilot.
Level off quickly and fly straight.
If you see lightning, fly toward it because there won't be a lot of other planes to worry about near it and you have an "IFR Practice area" all to yourself. If you can't find lightning, look on foreflight for a TFR.
Practice turns, stalls, and unusual attitudes.
NUMBER ONE MOST IMPORTANT THING: Keep an eye on your fuel gauge. If you run out of fuel and crash people are going to Monday morning quarterback your very safe IFR training flight and talk about how you are not safe because you didn't plan fuel well.
After you are done practicing in the clouds, you are going to want to go home.
Start by getting really low and turning off your transponder (just a formality common on IFR flights) get lower and lower until you see the ground.
Now try to find a road that you recognize. Once you find it, hopefully you remembered to bring your Mapsco. That will get you back home.
I promise no CFI is going to tell you to do all that because they want your money but if you go do that a few times you will be golden.
Just remember Clouds are in the sky. So if you are in a cloud, you are in the sky.
That is exactly where you want to be in a plane. The sky.
Like my CFI told me the day before he crashed into a mountain and died
"It's just flying. and you are a pilot right?"