Can I write my own will?

Yes you can write your own will; you can also take out your own appendix with a pen knife if you wish and you may do yourself less harm if you do your own surgery than if you do your own will, although frankly I do not advise people to do either activity on their own. Writing a will can be a complicated process to do properly. It involves coordinating assets which will not usually be covered by the will, such as life insurance or retirement benefits, being aware of tax laws and how they affect your estate and being aware of and following exactly the precise laws governing the execution and witnessing of your will.