How to safely warm up bought x accounts?

I recently bought a small batch of X accounts from a seller I found here, and I'm thinking of picking up more if this round works out. I already asked the seller for warm-up tips and managed to log into about 10 accounts successfully so far. None of them got suspended right away, which is a good sign.
But I’d like to hear from others who’ve done this before: what are some best practices to avoid getting flagged or shadowbanned during the early days?
Anything I should avoid doing? How long should I wait before posting or following people?

You should isolate each account properly from the start, using the same browser or IP across multiple logins increases the chance of getting flagged.
Use an antidetect browser (multilogin, hidemyacc, etc.) to give each account a unique environment, and pair that with clean residential proxies.
During the first few days, just log in, browse a bit, maybe like a few posts. Avoid tweeting, following, or doing anything repetitive too early.

I have used bought X accounts before and warmed them up slowly. What worked for me was using them slowly at first—just logging in, browsing, liking a few posts daily, and avoiding any links or spammy actions. After a week or two, I’d start posting small stuff. Keeping it natural really helps avoid bans.

I recently had an organic account banned on Twitter. I created it back in 2012. And it was banned for minor stuff.
I would cross post a topical content link to my own post, as a reply to a few main posts. Didn't do this a lot, just now and then to get relevant traffic. It was mostly about AI news/commentary or respectable crypto projects. They banned me with savagery, as I had posted plenty of interesting unique content as well. Just a warning for others.

Good start, I'd say. You already got warming-up more or less on the head so just keep tabs of your login patterns or login behaviour. Sometimes just scroll around a bit, like a post or two before engaging in any real warmup action. Stuff like not accessing the accounts all at once and at mixed intervals and durations also helps to look organic rather than setting a specific amount of time for each account. Customise the accounts eventually in different times, I suppose.
The other side of that is the setup, but ideally you already know to keep the profiles clear of each other to not compromise the accounts.
As long as you move gradually and don’t trip any obvious red flags, you should be in good shape. Shadowbans usually come from looking like a bot, spamming, etc. and not just from being new so there's that.

If the accounts are used, it’s best to use a proxy that matches the country where the account was originally used to avoid issues.

Another thing to keep in mind is not to start with the activity you want right away. If the accounts are old, I suggest continuing with similar activity to what the account already had, and gradually start interacting the way you want.

who was your seller I am trying to get in touch with one

To safely warm up bought X accounts, start by logging in slowly and engaging in natural activity like liking, commenting, and following. Avoid doing too much too quickly. Gradually increase the activity over time and use proxies to prevent detection.

Is it better to use chrome automation or some libraries that using direct requests?