Article table has a lot of null. What is the best way to prevent null in MySQL

I’m optimizing table schema.

My case is like.

User can generate an article.

It has a lot of item. like name, age, sex, address, hobby…

name, sex is a required entry.

but age, address, hobby is not required entry.

Table has a lot of null currently.

Sometimes null is changed attribute domain value when user edit article.

  name   |   age   |   sex   |   address   |   hobby
  aa         null      male        null        soccer
  bb         17        female      null        null

So I’m thinking 2 case.

1.

Table: article
Column: id, name, sex
Primary key: id

Table: article_sub
Column: article_id, type(0:age, 1:address, 2:hobby), value
Primary key: article_id, type

This case have to set varchar data type to value.

Because age is integer, address is string… so size is demerit.

2.

Table: article
Column: id, name, sex
Primary key: id

Table: article_sub_integer
Column: article_id, value
Primary key: article_id

Table: article_sub_string
Column: article_id, type(0:address, 1:hobby), value
Primary key: article_id, type

This case I have to refer 3 table.

Which way is the better?

If you have other idea Please tell me.

Thank you.

PERSON 
+----+------+------+-------------+
| ID | name | attr | description |
+----+------+------+-------------+

PERSON
+----+------+------+
| ID | name | attr |
+----+------+------+

P_DESCR
+------+-------------+
| P_ID | description |
+------+-------------+

SELECT * 
  FROM      person  AS w
  LEFT JOIN p_descr AS z ON z.p_id = w.id
 WHERE w.id = 1234
;