What is the best advice for applying for an Education visa in Thailand after multiple tourist visas and which visa run service is most reliable?

PLEASE HELP:

I've been in Thailand for close to 1y5m on tourist visas. Now i'm in Samui and would like to apply for an Education visa.

The school i have just signed up with has told me there is a high chance I'll be declined if i go to Penang, Malaysia (with MySamui and EasyWay visa run service).

They are advising for me to go to Kota Baru, Malaysia instead (with HD Visa Tours who apparently has 100% success rate).

Is there any helpful advice/information you could give me?

Does anybody know a visa run service to Penang with 100% success rate?

Anybody have experience/info about HD Visa tour?

Heres my passport history:

- ME TR Visa 6months

- Visa Exempt. Entry via land (Mae Sai) + 30d ext.

- SE TR Visa 60days + 30d ext. (via KL, malay.)

- Visa Exempt. Entry via land (Mae Sai) + 30d ext.

- Back to home country AUSTRALIA for 2wk.

- SE TR Visa 60days + 30d ext. (via Sydney, Au.)

- Visa Exempt. Entry via air (KL to DMK) + 30d ext.

THANK YOU 🙏🏽