Part-time work is unlikely. Dress code is conservative for visiting clients. Currently more men in senior positions. Some companies, especially smaller ones may look for IT related degrees. It can help if Art students have some evidence of an interest in computers.
Graduates are usually preferred.
HND holders with IT experience may be considered. But an MSc IT conversion course for non-relevant graduates can be helpful but may not be necessary for larger organisations. This is not possible or unlikely Entry without a degree or a HND with work experience is unusual. Experience Pre-entry experience is not needed You might be attractive to some companies if you have done IT related vacation work or an industrial placement. Experience that develops team leadership and interpersonal skills is helpful.