I use “and” and “but” at the beginning of sentences with no guilt whatsoever. If the tone is conversational then I let it happen. But, (see) I will edit some of them out because too many reduces the effect. When used infrequently, they have a way of bringing out the conversation...
Generally, youuse the first letter of your first and the first letter of your last name as your initials, but you can also include the first letter of your middle name or maiden name, or more than one letter from one of the names (e.g. someone with the last name DiAmico using both...